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 A190835 Number of permutations of 6 copies of 1..n introduced in order 1..n with no element equal to another within a distance of 1. 6
 1, 0, 1, 8142, 351574834, 47940557125969, 16985819072511102549, 13519747358522016160671387, 21671513613423101256198918372909, 64311863997340571475504065539218471107, 330586922756304429697714946501284146322953006 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS Seiichi Manyama, Table of n, a(n) for n = 0..100 (terms 1..14 from R. J. Mathar) FORMULA a(n) ~ sqrt(6) * 324^n * n^(5*n) / (5^n * exp(5*n + 5)). - 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 ..3....3....1....3....1....3....3....3....1....1....3....3....3....3....3....3 ..2....2....3....2....3....2....2....1....2....3....1....1....2....2....2....1 ..1....3....2....3....2....1....3....3....1....2....3....3....3....3....1....2 ..2....1....3....1....3....3....1....2....3....3....2....2....2....1....3....1 ..3....2....1....2....1....2....3....3....1....2....3....3....1....2....2....2 ..2....1....3....3....3....1....2....2....3....3....1....1....3....3....3....3 ..3....2....2....1....2....2....1....3....2....2....2....3....1....2....2....2 ..1....3....3....3....3....3....2....1....3....1....1....1....3....1....1....1 ..3....1....2....2....2....1....1....3....2....3....2....2....2....3....3....3 ..1....2....1....3....1....3....2....1....3....1....1....3....1....2....1....1 ..3....3....2....2....3....1....1....2....2....2....3....2....2....1....2....2 ..1....1....3....1....2....3....3....3....1....3....2....3....1....3....1....3 ..2....3....2....3....1....2....1....1....2....1....1....2....3....1....2....2 ..3....1....1....1....2....1....3....2....3....3....3....1....1....2....3....3 ..1....3....3....2....3....2....2....1....1....2....2....2....2....1....1....1 ..2....2....1....1....1....3....3....2....3....1....3....1....3....3....3....3 CROSSREFS Sequence in context: A252144 A201802 A233814 * A013689 A252914 A230785 Adjacent sequences:  A190832 A190833 A190834 * A190836 A190837 A190838 KEYWORD nonn AUTHOR R. H. Hardin May 21 2011 EXTENSIONS a(0)=1 prepended by Seiichi Manyama, Nov 16 2018 STATUS approved

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Last modified August 3 06:43 EDT 2021. Contains 346435 sequences. (Running on oeis4.)