A172298 a(n) = A027641(n) * A164555(n).

1, -1, 1, 0, 1, 0, 1, 0, 1, 0, 25, 0, 477481, 0, 49, 0, 13082689, 0, 1924313689, 0, 30489001321, 0, 730192467169, 0, 55867983514256281, 0, 73155570928609, 0, 564036899167989738841, 0, 74232720893311466588760025, 0, 59433630916551169012841089, 0, 6644474695172651051906689

Offset

0,11

Comments

Squares of Bernoulli number numerators (apart from the sign flipped at a(1)).

The associated denominators of the squared Bernoulli numbers are in A172282.

Links

Table of n, a(n) for n=0..34.

Crossrefs

Cf. A027641, A164555, A172282.

Sequence in context: A179809 A110416 A028848 * A040630 A040631 A040632

Adjacent sequences: A172295 A172296 A172297 * A172299 A172300 A172301

Keyword

sign

Author

Paul Curtz, Jan 31 2010

Extensions

Edited and extended by R. J. Mathar, Feb 02 2010

Status

approved