OFFSET
0,4
LINKS
FORMULA
a(n) = (2n+1)*(n+1)!*Bernoulli(2n).
a(n) ~ (-1)^(n+1)*8*sqrt(2)*n^3*(n/e)^(3*n)*Pi^(1-2*n). - Vladimir Reshetnikov, Sep 05 2016
MAPLE
seq((2*n+1)*(n+1)!*bernoulli(2*n), n=0..50); # Robert Israel, Oct 18 2015
MATHEMATICA
Table[(2n + 1) (n + 1)! BernoulliB[2n], {n, 0, 17}]
PROG
(PARI) vector(30, n, n--; (2*n+1)*(n+1)!*bernfrac(2*n)) \\ Altug Alkan, Oct 18 2015
(Python)
from math import factorial
from sympy import bernoulli
def A263445(n): return (2*n+1)*factorial(n+1)*bernoulli(2*n) # Chai Wah Wu, May 18 2022
CROSSREFS
KEYWORD
sign
AUTHOR
Vladimir Reshetnikov, Oct 18 2015
STATUS
approved