100450

Appears in sequences

• a(n) = n*(n+5)*(n+6)*(n+7)/24.at n=35A005587
• Positive numbers k such that k and 5*k are anagrams in base 6 (written in base 6).at n=8A023067
• a(n) = A026637(2*n-1, n-2).at n=8A026642
• Triangle read by rows: T(n,k) is the coefficient of x^k in the ZZ polynomial of the hexagonal graphene flake O(3,4,n).at n=38A338244