42381

Appears in sequences

• Expansion of 1/((1-3x)(1-4x)(1-5x)(1-10x)).at n=4A028029
• Expansion of x*(1-4*x-3*x^2)/(1-5*x+5*x^3+x^4).at n=10A107377
• a(n) = (2*n^3 + 5*n^2 + 11*n)/2.at n=33A162263
• a(n) is the smallest number which can be represented as the sum of n distinct nonzero n-gonal pyramidal numbers in exactly n ways, or -1 if no such number exists.at n=10A350397