A056580 a(n) = round(e^(Pi*sqrt(n))).

1, 23, 85, 231, 535, 1124, 2198, 4072, 7228, 12392, 20632, 33506, 53252, 83048, 127359, 192401, 286751, 422151, 614552, 885480, 1263795, 1787960, 2508952, 3493970, 4831164, 6635624, 9056943, 12288744, 16580631, 22253151, 29716459

Offset: 0

Author

Henry Bottomley, Jun 30 2000

Keywords

• nonn

Links

• Seiichi Manyama, Table of n, a(n) for n = 0..200

Crossrefs

Cf. A019296, A019297, A035484, A056581.

Programs

PARI

{a(n) = round(exp(Pi*sqrt(n)))} \\ Seiichi Manyama, Jun 04 2018

Extensions

Definition corrected by Michael Somos, Sep 15 2008