Triangular array read by rows: T(n,k) is the number of unlabeled simple graphs with n nodes that have exactly k isolated nodes, (n>=0, 0<=k<=n).
A217653
Triangular array read by rows: T(n,k) is the number of unlabeled simple graphs with n nodes that have exactly k isolated nodes, (n>=0, 0<=k<=n).
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =0a(5) =1a(6) =2a(7) =1a(8) =0a(9) =1a(10) =7a(11) =2a(12) =1a(13) =0a(14) =1a(15) =23a(16) =7a(17) =2a(18) =1a(19) =0a(20) =1a(21) =122a(22) =23a(23) =7a(24) =2a(25) =1a(26) =0a(27) =1a(28) =888a(29) =122
External references
- oeis: A217653