728575

Appears in sequences

• a(n) = Sum_{2*i+3*j=n, 0<=i<=n, 0<=j<=n} n!/( (2*i)!*(3*j)! ).at n=22A094715
• Coefficients of x in the reduction of the polynomial p(n,x) = ((x+2)^n + (x-2)^n)/2 by x^2->x+2.at n=11A192356
• Number of second differences of arrays of length 5 of numbers in 0..n.at n=32A228220
• a(n) = Sum_{k=0..n} Stirling2(2*n+k, k) * C(n, k).at n=4A242019
• a(n) = Sum_{k=0..floor(n/6)} binomial(n,6*k).at n=22A306847
• Cogrowth sequence of the 12-element group C6 X C2 = <S,T | S^6, T^2, [S,T]>.at n=11A377627
• a(n) = Sum_{k=0..n} binomial(3*n+1,6*k).at n=7A387875
• a(n) = Sum_{k=0..n} binomial(6*n+4,6*k).at n=3A387878