47515

Appears in sequences

• Quasi-Carmichael numbers to base -5: squarefree composites n such that prime p|n ==> p+5|n+5.at n=13A029565
• Number of partitions of n into parts not of the form 23k, 23k+10 or 23k-10. Also number of partitions with at most 9 parts of size 1 and differences between parts at distance 10 are greater than 1.at n=42A035998
• (Terms in A028273)/2.at n=33A051298
• Number of benzenoids with 21 hexagons, C_(2h) symmetry and containing 2n carbon atoms.at n=9A121964
• a(n) = numerator of constant lambda(n) involved in a recurrence for the Atkin polynomials A_k(j).at n=36A145226
• a(n) = Sum_{k=1..n} gcd(n,k)^n.at n=5A332517
• a(n) = Sum_{k=1..n} gcd(k, n)^6.at n=5A343508
• Square array T(n,k), n >= 1, k >= 1, read by antidiagonals, where T(n,k) = Sum_{j=1..n} gcd(j, n)^k.at n=60A343510
• Triangle read by rows: T(n,k) = number of heapable permutations of length n whose longest decreasing subsequence has length k.at n=28A390146