19783

Appears in sequences

• Maxima of the rows of the triangle A259095.at n=45A005577
• Number of partitions of n into parts not of the form 19k, 19k+2 or 19k-2. Also number of partitions with 1 part of size 1 and differences between parts at distance 8 are greater than 1.at n=43A035971
• Number of sets of lists (cf. A000262) whose list sizes are not a multiple of 3.at n=7A113775
• Number of ways to place zero or more nonadjacent (0,0) (1,0) (1,1) (2,0) (3,1) (4,0) (4,1) (5,1) polyhexes in any orientation on a planar n X n X n triangular grid.at n=7A155367
• Number of 0..n arrays x(0..6) of 7 elements with nondecreasing average value and 0..n occur with instance counts within one of each other.at n=9A200946
• Triangle read by rows: T(n,k) = number of graphs with n nodes and k connected regular components.at n=79A275420
• a(n) is the sum of quadratic nonresidues of A002145(n) (the n-th prime == 3 mod 4).at n=30A282036
• Let p = n-th prime == 7 mod 8; a(n) = sum of quadratic nonresidues mod p.at n=15A282043
• Square array A(n,k), n >= 0, k >= 1, read by antidiagonals, where column k is the expansion of e.g.f. Product_{j > 0, j mod k > 0} exp(x^j).at n=52A293525
• Number of maximal subsets of {1..n} containing n such that every ordered pair of distinct elements has a different difference.at n=34A325880
• Number of compositions of n into distinct parts such that the difference between adjacent parts is at least two.at n=31A328222