OFFSET
0,2
FORMULA
a(n) = A363150(2*n).
EXAMPLE
r(n) = 1, 7/12, -7/180, 23/630, -121/2100, 481/3465, -3015581/6306300, 67337/30030, ...
MAPLE
MATHEMATICA
Table[Numerator[Sum[BernoulliB[j, 1] * BernoulliB[2*n-j, 1], {j, 0, 2*n}]], {n, 0, 20}] (* Vaclav Kotesovec, May 19 2023 *)
CROSSREFS
KEYWORD
sign,frac
AUTHOR
Peter Luschny, May 18 2023
STATUS
approved