Sum of n-th antidiagonal of array in A144502.

A144503

Sum of n-th antidiagonal of array in A144502.

Terms

    a(0) =1a(1) =2a(2) =5a(3) =20a(4) =121a(5) =982a(6) =9933a(7) =120168a(8) =1692273a(9) =27196522a(10) =491229653a(11) =9851789564a(12) =217230600041

External references