Triangle read by rows: T(n,k) is the number of labeled connected planar graphs on n vertices and k edges.
A288265
Triangle read by rows: T(n,k) is the number of labeled connected planar graphs on n vertices and k edges.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =1a(4) =16a(5) =15a(6) =6a(7) =1a(8) =125a(9) =222a(10) =205a(11) =120a(12) =45a(13) =10a(14) =1296a(15) =3660a(16) =5700a(17) =6165a(18) =4935a(19) =2937a(20) =1125a(21) =195a(22) =16807a(23) =68295a(24) =156555a(25) =258125a(26) =330456a(27) =334530a(28) =254275a(29) =131985
External references
- oeis: A288265