33668

Appears in sequences

• a(n) = n*(n^4 + 10*n^3 + 35*n^2 + 50*n + 144)/120.at n=18A051745
• a(n) = floor(2*(3/2)^n).at n=24A147788
• a(n) = round(2*(3/2)^n), using round-to-even method.at n=23A147789
• a(n) = n * Sum_{d|n} binomial(d+4,5)/d.at n=18A343546
• Irregular triangle read by rows: T(n,k) is the sum of the widths of the free polyominoes with n cells and width k, n >= 1, 1 <= k <= ceiling(n/2).at n=33A379637