53529984

Appears in sequences

• Pyramid P(n, t, d) read by planes and rows, for 0 <= t+d <= n: number of ways n triples can sit in a row so that exactly t triples are together and exactly d triples are separated into a couple and a loner.at n=20A192990
• Number of ways n triples can sit in a row without any siblings next to each other.at n=4A193624
• Permanent of the n-th principal submatrix of A204267.at n=10A204268
• Permanent of the n-th principal submatrix of A204425.at n=10A204426
• Permanent of the n-th principal submatrix of A204431.at n=10A204432
• Numbers of directed Hamiltonian paths in the complete 4-partite graph K_{n,n,n,n}.at n=2A377586