230964

Appears in sequences

• a(n) = 2^n - C(n,0) - C(n,1) - ... - C(n,6).at n=18A035039
• a(n) = Sum_{k=0..11} C(n, k).at n=18A219531
• a(n) = binomial(3*n, n + 1)*hypergeom([1, 1 - 2*n], [2 + n], -1).at n=6A321957