Triangular array: Number of partitions of the vertex set of a forest of two trees on n vertices into k nonempty independent sets.

A227341

Triangular array: Number of partitions of the vertex set of a forest of two trees on n vertices into k nonempty independent sets.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =0a(4) =2a(5) =1a(6) =0a(7) =2a(8) =4a(9) =1a(10) =0a(11) =2a(12) =10a(13) =7a(14) =1a(15) =0a(16) =2a(17) =22a(18) =31a(19) =11a(20) =1a(21) =0a(22) =2a(23) =46a(24) =115a(25) =75a(26) =16a(27) =1a(28) =0a(29) =2

External references