27373

Appears in sequences

• Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 4,1 polyhexes in any orientation on a planar n X n X n triangular grid.at n=7A155238
• Number of distinct sums of subsets of the first n squares {1,4,9,...,n^2}.at n=42A208531
• Number of nX4 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,0) or (-1,1) and new values introduced in order 0..2.at n=6A275397
• Number of 7Xn 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,0) or (-1,1) and new values introduced in order 0..2.at n=3A275406
• Square spiral in which each new term is the sum of its two largest neighbors.at n=51A278180
• Sum over all partitions of n of the product of the number of parts and the number of distinct parts.at n=22A339011
• a(n) is the smallest positive integer which can be represented as the sum of distinct nonzero n-gonal pyramidal numbers in exactly n ways, or 0 if no such integer exists.at n=14A350210
• Expansion of (1/x) * Series_Reversion( x * (1 - x)^2 / (1 + x^3 / (1 - x)^2) ).at n=7A389549