%I #9 May 20 2021 12:23:43
%S 1,-1,1,0,1,0,1,0,1,0,25,0,477481,0,49,0,13082689,0,1924313689,0,
%T 30489001321,0,730192467169,0,55867983514256281,0,73155570928609,0,
%U 564036899167989738841,0,74232720893311466588760025,0,59433630916551169012841089,0,6644474695172651051906689
%N a(n) = A027641(n) * A164555(n).
%C Squares of Bernoulli number numerators (apart from the sign flipped at a(1)).
%C The associated denominators of the squared Bernoulli numbers are in A172282.
%Y Cf. A027641, A164555, A172282.
%K sign
%O 0,11
%A _Paul Curtz_, Jan 31 2010
%E Edited and extended by _R. J. Mathar_, Feb 02 2010