Number of bicolored graphs on n unlabeled nodes such that black nodes are not adjacent to each other and every white node is adjacent to a black node.
A340021
Number of bicolored graphs on n unlabeled nodes such that black nodes are not adjacent to each other and every white node is adjacent to a black node.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =66a(6) =407a(7) =3948a(8) =66781a(9) =2057140a(10) =117820559a(11) =12562407832
External references
- oeis: A340021