cp's OEIS Frontend

A051290 Triangular array T read by rows: T(n,k)=P(2n+3,n,2k+3), where P(n,k,c)=number of vectors (x(1),x(2,),...,x(n)) of k 1's and n-k 0's such that x(i)=x(n+1-i) for exactly c values of i.

Original entry on oeis.org

			Triangle begins:
   1;
   4,  1;
  12,  6,   3;
  32, 24,  24, 4,
  80, 80, 120, 40, 10;
  ...