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 A215742 Number of horizontal, vertical, diagonal and antidiagonal neighbor colorings of the odd squares of an n X 5 array with new integer colors introduced in row major order. 1
 1, 1, 5, 22, 1250, 24236, 4851360, 190497926, 83943993818, 5303141087778, 4173873098644366, 378359478068949014, 472112409203884877570, 57309542487149770566536, 104912731359552572271902248, 16280064095604977906371524266, 41397926646267697867589499650186 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Andrew Howroyd, Table of n, a(n) for n = 0..50 EXAMPLE Some solutions for n=3: ..x..0..x..1..x....x..0..x..1..x....x..0..x..1..x....x..0..x..1..x ..2..x..3..x..2....2..x..3..x..4....2..x..3..x..0....2..x..3..x..4 ..x..4..x..0..x....x..5..x..0..x....x..4..x..5..x....x..4..x..5..x CROSSREFS Column 5 of A215745. Sequence in context: A271678 A002069 A298233 * A357948 A367721 A282688 Adjacent sequences: A215739 A215740 A215741 * A215743 A215744 A215745 KEYWORD nonn AUTHOR R. H. Hardin, Aug 22 2012 EXTENSIONS a(0)=1 prepended and terms a(10) and beyond from Andrew Howroyd, Jun 25 2017 STATUS approved

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Last modified April 14 23:31 EDT 2024. Contains 371667 sequences. (Running on oeis4.)