Triangle read by rows where T(n,k) is the number of labeled simple graphs with n vertices and exactly k endpoints (vertices of degree 1).
A327369
Triangle read by rows where T(n,k) is the number of labeled simple graphs with n vertices and exactly k endpoints (vertices of degree 1).
Terms
- a(0) =1a(1) =1a(2) =0a(3) =1a(4) =0a(5) =1a(6) =2a(7) =0a(8) =6a(9) =0a(10) =15a(11) =12a(12) =30a(13) =4a(14) =3a(15) =314a(16) =320a(17) =260a(18) =80a(19) =50a(20) =0a(21) =13757a(22) =10890a(23) =5445a(24) =1860a(25) =735a(26) =66a(27) =15a(28) =1142968a(29) =640836
External references
- oeis: A327369