55195

Appears in sequences

• a(n) = (n+1)*(n+2)*(n+3)*(9n+4)/24.at n=18A051798
• Self-convolution of A004148 (the RNA secondary structure numbers) with itself.at n=14A089735
• a(n) = (n-1)*(n+2)*(2*n+11)/2.at n=35A130862
• 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, 1), (-1, 1, -1), (-1, 1, 1), (1, -1, -1), (1, 0, 0)}.at n=11A148266