A136731 Column 1 of square array A136730.

1, 2, 5, 23, 175, 1935, 28432, 523290, 11587072, 299942890, 8886126540, 296438370794, 10993731095695, 448604373236731, 19971257117211555, 963142501803505255, 50015707804752012825, 2782336529985704607295

Offset

0,2

Links

Table of n, a(n) for n=0..17.

Crossrefs

Cf. A136730; A101482, A136732.

Sequence in context: A191600 A343020 A167142 * A257030 A062495 A158889

Adjacent sequences: A136728 A136729 A136730 * A136732 A136733 A136734

Keyword

nonn

Author

Paul D. Hanna, Jan 19 2008

Status

approved