26025

Appears in sequences

• a(n) = n*(5*n^2 - 2)/3.at n=25A004466
• Number of partitions satisfying cn(0,5) + cn(2,5) + cn(3,5) <= cn(1,5) + cn(4,5).at n=40A039879
• Numbers whose base-4 representation contains exactly four 1's and four 2's.at n=18A045109
• Triangular array: the fission of ((2x+1)^n) by (q(n,x)), where q(n,x)=x^n+x^(n-1)+...+x+1.at n=51A193860
• Mirror of the triangle A193860.at n=48A193861
• Number of skew partitions of n whose diagrams have no empty rows and columns.at n=10A225114
• Numbers m such that each of p=6*m+1, q=6*p+1, r=6*q+1 and s=6*r+1 is prime.at n=31A263311
• Number of sets of exactly five positive integers <= n having a square element sum.at n=33A281865
• Number of compositions (ordered partitions) of n into at most 5 squarefree parts.at n=45A347780
• Number of connected 3-regular (cubic) multigraphs on 2n unlabeled nodes rooted at an unoriented edge (or loop) whose removal does not disconnect the graph, loops allowed.at n=6A361447
• Expansion of o.g.f. x^4/((1-2*x)^3*(1-3*x)^3).at n=9A369416
• Integers k such that A378414(k) == k (mod A066417(k)).at n=11A378481