33861

Appears in sequences

• Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=2, r=3, I={0,2}.at n=20A080006
• Indices of primes occurring in A030284.at n=35A107365
• Antidiagonal sums of triangular array T: T(j,1) = 1 for ((j-1) mod 6) < 3, else 0; T(j,k) = T(j-1,k-1) + T(j-1,k) for 2 <= k <= j.at n=30A131025
• Triangle read by rows: T(n,k) = 1 + (q-binomial coefficient [n,k] for q=3) - binomial(n,k).at n=24A176421
• Number of triangles, distinct up to congruence, on a centered hexagonal grid of size n.at n=13A241231
• Number of nX4 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=11A300502
• Centered truncated octahedral numbers: the number of integer triples (x,y,z) such that max(|x|,|y|,|z|) <= 2n and |x|+|y|+|z| <= 3n.at n=10A371515
• E.g.f. A(x) satisfies A(x) = 1/( 1 - A(x) * sinh(x * A(x)) ).at n=5A381177