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 A193311 Number of n X n symmetric 0..5 arrays with no element equal to any horizontal or vertical neighbor, containing at least one 5 and with new values 0..5 introduced in lower triangular row major order 0
 0, 0, 1, 4542, 14738163, 133285442691, 4508743067686948, 622715995190475951953, 359265265609409060043111601, 869862398667109067205080837833962 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 LINKS EXAMPLE Some solutions for 4X4 ..0..1..3..1....0..1..3..5....0..1..3..5....0..1..0..4....0..1..3..2 ..1..2..4..2....1..2..4..3....1..2..0..2....1..2..3..0....1..2..4..5 ..3..4..3..4....3..4..0..4....3..0..4..3....0..3..4..3....3..4..1..4 ..1..2..4..5....5..3..4..1....5..2..3..1....4..0..3..5....2..5..4..1 CROSSREFS Sequence in context: A262848 A307919 A031607 * A020432 A186471 A210305 Adjacent sequences:  A193308 A193309 A193310 * A193312 A193313 A193314 KEYWORD nonn AUTHOR R. H. Hardin Jul 22 2011 STATUS approved

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Last modified January 22 02:46 EST 2022. Contains 350481 sequences. (Running on oeis4.)