144108
domain: N
Appears in sequences
- a(n) = Sum_{m=1..n} A000045(m)*(A004001(m+1) - 2*A004001(m) + A004001(m-1)).at n=26A120475
- Array read by antidiagonals: T(n,m) is the number of matchings in the torus grid graph C_n X C_m.at n=30A270246
- Array read by antidiagonals: T(n,m) is the number of matchings in the torus grid graph C_n X C_m.at n=33A270246
- E.g.f.: exp(9*(exp(x)-1)).at n=5A276506