Number of rooted bicolored trees on n nodes such that black nodes are not adjacent to each other.

A339831

Number of rooted bicolored trees on n nodes such that black nodes are not adjacent to each other.

Terms

    a(0) =2a(1) =3a(2) =9a(3) =28a(4) =97a(5) =346a(6) =1302a(7) =5014a(8) =19830a(9) =79813a(10) =326344a(11) =1350918a(12) =5652334a(13) =23861787a(14) =101519790a(15) =434827232a(16) =1873491739a(17) =8114411769a(18) =35309142309a(19) =154288183928a(20) =676730773252

External references