Gessel-Stanley triangle read by rows: triangle of coefficients of polynomials arising in connection with enumeration of intransitive trees by number of nodes and number of right nodes.

A029847

Gessel-Stanley triangle read by rows: triangle of coefficients of polynomials arising in connection with enumeration of intransitive trees by number of nodes and number of right nodes.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =1a(7) =1a(8) =17a(9) =17a(10) =1a(11) =1a(12) =49a(13) =146a(14) =49a(15) =1a(16) =1a(17) =129a(18) =922a(19) =922a(20) =129a(21) =1a(22) =1a(23) =321a(24) =4887a(25) =11234a(26) =4887a(27) =321a(28) =1a(29) =1

External references