OFFSET
-2,4
COMMENTS
See A233316.
MATHEMATICA
b[-2] = b[-1] = 0; b[1] = 1/2; b[n_] := BernoulliB[n]; a[n_] := (n + 1)*(n + 2)/2*b[n] // Denominator; Table[a[n], {n, -2, 60}]
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
Jean-François Alcover and Paul Curtz, Dec 12 2013
STATUS
approved