18982
domain: N
Appears in sequences
- First differences are A005563.at n=37A047732
- a(n) = Sum_{ d divides n } (n/d)^(2d).at n=13A073705
- a(n) = n^3 - 4*n^2 + 6*n - 2.at n=25A188377
- G.f.: Sum_{n>=0} (1 + x^n)^n * x^n / (1-x)^(n+1).at n=14A243988
- The number of monic integer polynomials of degree n all of whose roots are distinct and of modulus at most 1.at n=28A280709
- Expansion of Sum_{i>=1} mu(i)^2*x^i/(1 - x^i) / Product_{j>=1} (1 - x^j), where mu() is the Moebius function (A008683).at n=25A281573
- Number of not unique partition coefficients of n.at n=38A309897
- Centered 27-gonal numbers.at n=37A389797