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 A216613 Number of horizontal, diagonal and antidiagonal neighbor colorings of the odd squares of a 3Xn array with new integer colors introduced in row major order 1
 1, 2, 2, 15, 41, 716, 2847, 83440, 426422, 18171918, 112072316, 6423127757, 46054057965, 3376465219485, 27457462735926, 2486327138729353, 22530435476364494, 2454996141671330713, 24463971326544703312 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 3 of A216612 LINKS R. H. Hardin, Table of n, a(n) for n = 1..41 EXAMPLE Some solutions for n=4 ..x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1 ..2..x..3..x....2..x..3..x....1..x..2..x....2..x..3..x....2..x..3..x ..x..0..x..4....x..4..x..5....x..0..x..3....x..4..x..1....x..1..x..0 CROSSREFS Sequence in context: A185244 A329920 A006929 * A215900 A264838 A184718 Adjacent sequences: A216610 A216611 A216612 * A216614 A216615 A216616 KEYWORD nonn AUTHOR R. H. Hardin Sep 10 2012 STATUS approved

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Last modified June 8 00:26 EDT 2023. Contains 363157 sequences. (Running on oeis4.)