489280

Appears in sequences

• Central factorial numbers: unsigned 2nd subdiagonal of A182867.at n=3A049033
• Triangle T(n,k) defined by the generating function cosh(sqrt(y)*arcsin(x)) + sqrt(y)*sinh(sqrt(y)*arcsin(x)) - 1 = Sum_{n>=1} Sum_{k=1..n} T(n,k)*y^k *x^n/n!.at n=38A091885
• Third column (negated) of triangle in A182971.at n=9A184878
• G.f.: Sum_{n>=0} (n+1)*(n+2)*(n+3)/3! * x^n * (1 + x^n)^n.at n=63A326004