163380

Appears in sequences

• Triangle read by rows: T(n,k) is the coefficient of x^k in the ZZ polynomial of the hexagonal graphene flake O(3,3,n).at n=42A338158
• G.f. A(x) satisfies A(x) = 1 / ((1 - x) * (1 - x * A(x^3))).at n=24A367691