23154

Appears in sequences

• Number of homeomorphically irreducible multigraphs (or series-reduced multigraphs or multigraphs without nodes of degree 2) on 4 labeled nodes.at n=17A060534
• Permutations of 12345: Numbers having each of the decimal digits 1,...,5 exactly once, and no other digit.at n=31A178475
• Number of -n..n arrays x(0..4) of 5 elements with zero sum, and adjacent elements not equal modulo three (with -1 modulo 3 = 2).at n=9A199912
• Number of (n+1)X(n+1) -6..6 symmetric matrices with every 2X2 subblock having sum zero and two, three or four distinct values.at n=3A211260
• Sigma(n)-n values in A085844.at n=21A216383
• Derangements of {1,2,...,n} (n >= 2) in lexicographic order.at n=14A320588
• Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^binomial(k+4,5).at n=15A344205
• Number of edges in a hexagon when n internal hexagons are drawn between the 6n points that divide each side into n+1 equal parts.at n=44A357198
• Numbers k such that A360327(k) = A360327(k+1) > 1.at n=4A360358