Irregular triangular array read by rows. T(n,k) is the number of forests on n unlabeled nodes with exactly k distinct isomorphism classes of trees.

A336167

Irregular triangular array read by rows. T(n,k) is the number of forests on n unlabeled nodes with exactly k distinct isomorphism classes of trees.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =2a(5) =0a(6) =2a(7) =1a(8) =0a(9) =4a(10) =2a(11) =0a(12) =4a(13) =6a(14) =0a(15) =9a(16) =10a(17) =1a(18) =0a(19) =12a(20) =22a(21) =3a(22) =0a(23) =27a(24) =40a(25) =9a(26) =0a(27) =49a(28) =80a(29) =24

External references