22386

Appears in sequences

• sigma_4(n): sum of 4th powers of divisors of n.at n=11A001159
• Molien series for cyclic group of order 5.at n=38A008646
• a(n) = floor(C(n,4)/5).at n=42A011795
• Numbers k such that 7*2^k+1 is prime.at n=25A032353
• Sum of n-th powers of divisors of 12.at n=4A034660
• For n weights, number of combinations when limited to two weights per pan.at n=21A037255
• Numbers having four 3's in base 9.at n=27A043468
• a(n) = T(n,5), array T as in A051168; a count of Lyndon words; aperiodic necklaces with 5 black beads and n-5 white beads.at n=38A051170
• Partial sums of A051740.at n=11A051877
• Sum of numbers that can be written as t*n + u*(n+1) for nonnegative integers t,u in exactly one way.at n=11A076454
• Numbers n such that 3^n-2^(n-1) is prime.at n=33A095906
• Numbers k such that 2*10^k + 5*R_k + 2 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=15A099006
• Number of reduced words of length n in Coxeter group on 13 generators S_i with relations (S_i)^2 = (S_i S_j)^4 = I.at n=4A163084
• a(n) = 13*n*(n+1).at n=41A173307
• Binomial(prime(n),s)/prime(n) where s is the sum of the decimal digits of n.at n=13A176266
• Degrees of irreducible representations of orthogonal group O8-(3).at n=22A214474
• Degrees of irreducible representations of orthogonal group O8-(3).at n=23A214474
• Expansion of (1+4*x+x^2)/((1+x)^2*(1-x)^5).at n=22A233329
• a(n) = binomial(n+4,4)*gcd(n,5)/5.at n=38A234042
• The number of partitions of n into at least 3 parts from which we can form every partition of n into 3 parts by summing elements.at n=41A236970