20972

Appears in sequences

• Number of fixed n-celled polyknights.at n=5A030444
• Number of subsets of {1,2,3,...,n} that sum to 0 mod 25.at n=19A068043
• Triangle T(n,m) (read as T(1,1); T(2,1), T(2,2); T(3,1), T(3,2), T(3,3);) Number of distinct non-recursive Catalan Automorphisms whose minimum clause-representation requires examination of n nodes in total, divided into m non-default clauses.at n=23A089831
• Number of 2 X 2 symmetric matrices over Z(n) having nonzero determinant.at n=27A115077
• Number of n-step walks on square lattice, self-avoiding until the last step.at n=10A167402
• Convolution of primes with odd primes.at n=22A209403
• Second crank moment minus second rank moment: M_2(n) - N_2(n) = 2*spt(n).at n=25A211982
• Number of (n+2)X(3+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 0.at n=5A255086
• Number of (n+2)X(6+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 0.at n=2A255089
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 0.at n=30A255091
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 0.at n=33A255091
• Numbers n such that n!!! + 3^n is prime.at n=32A261617
• Number of nX3 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.at n=5A278802
• Number of nX6 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.at n=2A278805
• T(n,k)=Number of nXk 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.at n=30A278807
• T(n,k)=Number of nXk 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.at n=33A278807