23004

Appears in sequences

• Low-temperature susceptibility expansion for hexagonal lattice (Potts model, q=4).at n=13A057387
• a(n) = A077704(n+1)/A077704(n).at n=20A077705
• Indices of primes in the sequence defined by A(0) = 31, A(n) = 10*A(n-1) + 71 for n > 0.at n=19A101844
• Nine times hexagonal numbers: a(n) = 9*n*(2*n-1).at n=36A152994
• The Wiener index of the P_3 X P_n grid, where P_m is the path graph on m nodes. The Wiener index of a connected graph is the sum of distances between all unordered pairs of nodes in the graph.at n=23A180569
• Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2w<x+y.at n=35A182260
• Numbers whose Schwarzian arithmetic derivative is an integer.at n=32A209872
• Index of record values in A247190.at n=39A250985
• Number of moduli m such that the multiplicative order of n mod m equals n.at n=43A252760
• Total number of inversions in all set partitions of [n].at n=8A264082
• Triangle read by rows: T(n,k) is the number of multisets of k ternary words with a total of n letters.at n=29A275414
• G.f. A(x) satisfies: A(x) = x * Product_{k>=1} (1 + A(x^k))^k.at n=12A308370
• Number of partitions of n with up to eight distinct kinds of 1.at n=22A320695