43942081

Properties

Appears in sequences

• Number of numbers == 0 (mod 3) in range 2^n to 2^(n+1) with odd number of 1's in binary expansion.at n=27A000773
• Generalized Poly-Bernoulli numbers.at n=13A081674
• a(n) = Sum_{2*i+3*j=n, 0<=i<=n, 0<=j<=n} n!/( (2*i)!*(3*j)! ).at n=28A094715
• 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=14A192356
• a(n) = Sum_{k=0..floor(n/6)} binomial(n,6*k).at n=28A306847
• Cogrowth sequence of the 12-element group C6 X C2 = <S,T | S^6, T^2, [S,T]>.at n=14A377627
• a(n) = Sum_{k=0..n} binomial(4*n,6*k).at n=7A387849
• a(n) = Sum_{k=0..n} binomial(3*n+1,6*k).at n=9A387875
• a(n) = Sum_{k=0..n} binomial(6*n+4,6*k).at n=4A387878
• Prime numbersat n=2658030