22126

Appears in sequences

• Number of ways in which n identical balls can be distributed among 6 boxes in a row such that each pair of adjacent boxes contains at least 4 balls.at n=10A005339
• Coefficient of x^4 in (1-x-x^2)^(-n).at n=22A006504
• Number of partitions of n into parts of 23 kinds.at n=4A023021
• a(n) = a(n-1) + Sum_{0<k<=n/5} a(n-5k) with a(0)=1.at n=35A113444
• a(1)=1; a(n) = Sum_{1<=k<n, gcd(k,n(n+1)/2)=1} a(k).at n=24A125597
• Number of 4-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero.at n=24A208598
• Least k such that prime(n) is the smallest prime p for which k^2 + p^2 is also prime, or 0 if none.at n=51A263466
• Numbers n such that the decimal digits of n-phi(n) are a permutation of those of n.at n=40A273799
• a(n) = Sum_{i=1..n, j=1..n, gcd(i,j)=1} i.at n=40A333297
• Numbers k such that one of k-A001414(k) and k+A001414(k) is a prime and the other is the square of a prime.at n=10A358002
• Squarefree numbers k such that k^2 is abundant, and d^2 is nonabundant for any proper divisor d of k.at n=40A381741