173522

Appears in sequences

• Self-convolution of numbers of trees on n nodes.at n=17A006706
• Number of partitions of n which are not the partitions into (one or more) consecutive parts.at n=48A282467
• G.f.: (Sum_{k>=1} x^k/(1-x^k) * Product_{k>=1} 1/(1-x^k) )^2.at n=18A305120
• Number of integer partitions of n whose parts cannot be arranged into a (not necessarily square) matrix with equal row-sums and equal column-sums.at n=49A323348