Triangle read by rows: T(n,k) is the coefficient of (1+x)^k in the ZZ polynomial of the hexagonal graphene flake O(3,4,n).

A338259

Triangle read by rows: T(n,k) is the coefficient of (1+x)^k in the ZZ polynomial of the hexagonal graphene flake O(3,4,n).

Terms

    a(0) =1a(1) =12a(2) =18a(3) =41a(4) =24a(5) =120a(6) =200a(7) =120a(8) =24a(9) =11a(10) =36a(11) =306a(12) =996a(13) =1446a(14) =984a(15) =303a(16) =42a(17) =21a(18) =48a(19) =576a(20) =2800a(21) =6525a(22) =7848a(23) =4957a(24) =1644a(25) =274a(26) =22a(27) =11a(28) =60a(29) =930

External references