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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Jacobsthal-numbers/Quackery/jacobsthal-numbers.quackery Normal file
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[ 2 over ** -1 rot ** - 3 / ] is j ( n --> n )
[ 2 over ** -1 rot ** + ] is jl ( n --> n )
[ dup 1+ j swap j * ] is jo ( n --> n )
say "First 30 Jacobsthal numbers:"
cr
30 times [ i^ j echo sp ]
cr cr
say "First 30 Jacobsthal-Lucas numbers:"
cr
30 times [ i^ jl echo sp ]
cr cr
say "First 20 Jacobsthal oblong numbers:"
cr
20 times [ i^ jo echo sp ]
cr cr
say "First 10 Jacobsthal primes:"
cr
[] 0
[ dup j dup isprime iff
[ swap dip join ]
else drop
1+
over size 10 = until ]
drop
witheach [ echo sp ]