Triangle read by rows: T(n,k) is the coefficient of (1+x)^k in the ZZ polynomial of the hexagonal graphene flake O(3,3,n).

A338217

Triangle read by rows: T(n,k) is the coefficient of (1+x)^k in the ZZ polynomial of the hexagonal graphene flake O(3,3,n).

Terms

    a(0) =1a(1) =9a(2) =9a(3) =1a(4) =1a(5) =18a(6) =63a(7) =68a(8) =23a(9) =2a(10) =1a(11) =27a(12) =162a(13) =350a(14) =310a(15) =114a(16) =15a(17) =1a(18) =1a(19) =36a(20) =306a(21) =996a(22) =1446a(23) =984a(24) =303a(25) =42a(26) =2a(27) =1a(28) =45a(29) =495

External references