20263

Appears in sequences

• a(n) = n*(5*n^2 - 2)/3.at n=23A004466
• Pseudoprimes to base 90.at n=33A020218
• Strong pseudoprimes to base 32.at n=29A020258
• a(n)=Sum{T(n,j): j=1,2,...,n}, array T given by A048212.at n=29A048222
• G.f. A(x) equals the limit of the composition of functions (x+x^n); let F_1(x) = x, F_{n+1}(x) = F_n(x+x^(n+1)), then A(x) = limit F_n(x): A(x) = x o x+x^2 o x+x^3 o ... o x+x^n o...at n=19A119470
• L.g.f.: Sum_{n>=1} a(n)*x^n/n = Sum_{n>=1} x^n/n * exp( Sum_{k>=1} a(k)*x^(n*k)/k ).at n=10A209397
• Number of partitions p of n such that (maximal multiplicity of the parts of p) <= (number of distinct parts of p).at n=40A240306
• Number of partitions p = [x(1), ..., x(k)], where x(1) >= x(2) >= ... >= x(k), of n such that max(x(i) - x(i-1)) > number of distinct parts of p.at n=41A241822