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 A190837 Number of permutations of 8 copies of 1..n introduced in order 1..n with no element equal to another within a distance of 1. 6
 1, 0, 1, 400598, 1530622143864, 28920026907938624194, 2070756746775910218326948065, 459408385876250801291447710561829082, 271259741131895052775392614041761701799270286, 379065045836307787068046364731543393514652159389593652 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS Seiichi Manyama, Table of n, a(n) for n = 0..78 FORMULA a(n) ~ sqrt(8) * 131072^n * n^(7*n) / (315^n * exp(7*n + 7)). - Vaclav Kotesovec, Nov 24 2018 EXAMPLE Some solutions for n=3 ..1....1....1....1....1....1....1....1....1....1....1....1....1....1....1....1 ..2....2....2....2....2....2....2....2....2....2....2....2....2....2....2....2 ..1....1....1....1....1....1....1....1....1....1....1....1....1....1....1....1 ..2....2....2....3....2....3....2....2....3....2....2....2....3....2....2....2 ..3....3....3....1....3....1....1....1....1....1....1....3....1....3....3....3 ..2....1....1....3....1....2....2....3....2....3....3....1....3....1....2....1 ..3....3....2....1....2....1....3....2....3....1....1....3....1....3....3....2 ..1....2....3....2....1....2....1....1....2....3....3....2....2....2....2....3 ..3....1....1....1....3....1....2....3....3....2....1....1....3....3....3....2 ..1....3....2....2....2....2....1....2....1....1....2....3....1....1....2....3 ..2....1....1....1....3....3....3....1....3....3....1....2....3....3....3....1 ..1....3....3....3....1....1....1....2....1....2....2....3....2....2....1....3 ..2....2....1....2....3....3....2....3....3....3....3....2....3....3....2....2 ..3....3....3....3....1....1....3....1....2....2....2....3....2....2....1....3 ..1....1....2....2....3....3....2....3....1....3....3....1....1....3....2....1 ..3....3....3....3....2....2....3....2....3....2....1....3....3....1....3....3 ..2....2....1....1....3....3....1....3....2....1....2....1....2....3....1....2 ..1....3....3....3....2....2....3....2....3....3....3....2....1....2....3....1 ..3....2....2....2....3....1....1....1....2....2....2....1....2....3....1....2 ..2....1....3....3....1....3....3....3....3....3....3....3....3....1....3....3 ..3....2....1....2....2....2....2....1....2....1....1....1....2....2....1....1 ..1....3....2....3....1....3....3....3....1....3....3....2....1....1....3....3 ..2....2....3....1....3....2....2....2....2....2....2....3....3....2....2....2 ..3....1....2....2....2....3....3....3....1....1....3....2....2....1....1....1 CROSSREFS Sequence in context: A015424 A083634 A209910 * A205094 A234419 A096890 Adjacent sequences:  A190834 A190835 A190836 * A190838 A190839 A190840 KEYWORD nonn AUTHOR R. H. Hardin May 21 2011 EXTENSIONS a(0)=1 prepended and a(7)-a(9) added by Seiichi Manyama, Nov 16 2018 STATUS approved

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Last modified July 24 23:25 EDT 2021. Contains 346273 sequences. (Running on oeis4.)