RosettaCodeData/Task/Blum-integer/J/blum-integer-1.j

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2023-07-01 11:58:00 -04:00
isblum=: {{
ab=. q: y
if. 2= #ab do.
if. </ab do.
*./3=4|ab
else. 0 end.
else. 0 end.
}}"0
blumseq=: {{
r=. (#~ isblum) }.i.b=. 1e4
while. y>#r do.
r=. r, (#~ isblum) b+i.1e4
b=. b+1e4
end.
y{.r
}}