23 lines
804 B
Julia
23 lines
804 B
Julia
using Lazy
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using Primes
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J(n) = (2^n - (-1)^n) ÷ 3
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L(n) = 2^n + (-1)^n
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Jacobsthal = @>> Lazy.range(0) map(J)
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JLucas = @>> Lazy.range(0) map(L)
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Joblong = @>> Lazy.range(big"0") map(n -> J(n) * J(n + 1))
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Jprimes = @>> Lazy.range(big"0") map(J) filter(isprime)
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function printrows(title, vec, columnsize = 15, columns = 5, rjust=true)
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println(title)
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for (i, n) in enumerate(vec)
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print((rjust ? lpad : rpad)(n, columnsize), i % columns == 0 ? "\n" : "")
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end
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println()
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end
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printrows("Thirty Jacobsthal numbers:", collect(take(30, Jacobsthal)))
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printrows("Thirty Jacobsthal-Lucas numbers:", collect(take(30, JLucas)))
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printrows("Twenty oblong Jacobsthal numbers:", collect(take(20, Joblong)))
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printrows("Fifteen Jacabsthal prime numbers:", collect(take(15, Jprimes)), 40, 1, false)
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