75344

Appears in sequences

• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, -1, 1), (-1, 1, 1), (0, 1, -1), (1, 0, 0)}.at n=11A148256
• a(n) = (9*n+2)*(9*n+7).at n=30A177072
• Convolution of the even-indexed triangular numbers (A014105) and the squares (A000290).at n=16A277228
• Irregular triangle read by rows: T(n,k) (n>=2, 0<=k<=n) = total number of unbranched k-catapolyheptagons with k pentagons and n-k heptagons.at n=45A323850