254520

Appears in sequences

• a(n) = 3*(n-2)*(n-3)*(3*n^2-3*n-8)/2.at n=15A064198
• Non-palindromes whose squares are in A066531.at n=17A206642
• Triangular array read by rows: T(n,k) is the number of labeled quasi-orders on [n] that are composed of exactly k irreducible components n>=0, 0<=k<=n.at n=32A335987
• a(n) is the smallest number k with exactly n divisors in A033075.at n=21A355078
• a(n) is the smallest integer that has exactly n alternating divisors.at n=46A355594
• Expansion of e.g.f. exp(x^2/(1-x)^3).at n=7A386514