Triangle read by rows: coefficients eta(n,k) arising from the study of completely transitive graphs on n nodes.

A259970

Triangle read by rows: coefficients eta(n,k) arising from the study of completely transitive graphs on n nodes.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =1a(4) =3a(5) =3a(6) =6a(7) =28a(8) =42a(9) =21a(10) =91a(11) =510a(12) =1050a(13) =945a(14) =315a(15) =2820a(16) =18631a(17) =48360a(18) =61845a(19) =39060a(20) =9765a(21) =177661a(22) =1351413a(23) =4220433a(24) =6942915a(25) =6357015a(26) =3075975a(27) =615195

External references