39559

Appears in sequences

• Octahedral numbers: a(n) = n*(2*n^2 + 1)/3.at n=39A005900
• A simple grammar.at n=11A052831
• a(n) = (2*n - 1)*(8*n^2 - 8*n + 3)/3.at n=19A063496
• Antidiagonal sums of triangular array T: T(j,1) = 1 for ((j-1) mod 8) < 4, else 0; T(j,k) = T(j-1,k-1) + T(j,k-1) for 2 <= k <= j.at n=31A131077
• Partial sums of the odd triangular numbers (A014493).at n=38A352116