25270

Appears in sequences

• 4-dimensional figurate numbers: a(n) = n*binomial(n+2, 3).at n=18A002417
• Expansion of (1-x)^(-3) * (1-x^2)^(-2).at n=36A002624
• Product of sums of divisors and non-divisors.at n=36A066859
• Number of bimagic series for cubes of order n.at n=5A090653
• a(n) = (p^2*(p+1)*(p+2))/6 where p is n-th prime.at n=7A098741
• Bisection of A002417.at n=9A100430
• A double product sequence based on a=3;f(n,a)=f(n-1,a)+a*f(n-2,a).at n=17A173918
• A double product sequence based on a=3;f(n,a)=f(n-1,a)+a*f(n-2,a).at n=18A173918
• Number of numbers whose base 5/4 expansion (see A024634) has n digits.at n=41A245357
• a(n) = n*(n+1)*(22*n-19)/6.at n=19A256716
• Sum of squares of parts of the partitions of 2n into two squarefree parts.at n=28A280316
• Numbers n such that A083722(n) > 1 and A083722(n) occurs later in A083722.at n=18A293893
• Triangle read by rows, T(n,m) = Sum_{k=1..m} k*k!*(-1)^(m+k)*Stirling2(m,k)* C(2*n+k-2*m-1,n-m)/(n+k-m), for n >= 0 and 0 <= m <= n.at n=61A298753
• Number of multisets of exactly eight partitions of positive integers into distinct parts with total sum of parts equal to n.at n=19A320793
• Unitary weird numbers (A064114) that are not weird numbers (A006037).at n=4A328562
• Number of balanced reduced multisystems whose atoms constitute a strongly normal multiset of size n.at n=6A330475
• Infinitary weird numbers (A306984) whose number of divisors is not a power of 2.at n=5A335936
• Bi-unitary weird numbers (A292986) that are not exponentially odd numbers (A268335).at n=5A335939
• a(n) = Sum_{k=1..n} (-1)^k*k^3*floor(n/k).at n=37A366917
• The number of binary self numbers not exceeding 10^n.at n=5A386568