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 A218641 Hilltop maps: number of 6Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..3 6Xn array 0
 1, 4001, 261505, 16773633, 1073490145, 68702054721, 4396923919617, 281403077821441, 18009795930773137, 1152626873213807201, 73768115566393606785, 4721159119167361543169, 302154165890141908970689 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 6 of A218638 LINKS Table of n, a(n) for n=1..13. EXAMPLE Some solutions for n=3 ..0..1..0....0..0..1....0..1..0....0..1..0....0..0..0....0..0..1....0..0..1 ..1..0..0....0..0..1....0..1..0....0..1..0....1..1..0....1..1..0....1..1..0 ..1..0..0....0..1..0....1..0..0....1..0..0....1..0..0....0..0..0....1..0..1 ..0..0..1....1..1..1....1..1..0....1..1..1....0..0..0....1..0..1....1..1..0 ..0..0..0....1..0..1....0..0..0....0..0..1....0..0..0....0..1..0....0..1..1 ..0..0..1....1..1..0....1..1..1....0..1..0....1..1..1....1..0..0....1..1..1 CROSSREFS Sequence in context: A045262 A203088 A061700 * A092722 A034306 A228579 Adjacent sequences: A218638 A218639 A218640 * A218642 A218643 A218644 KEYWORD nonn AUTHOR R. H. Hardin Nov 03 2012 STATUS approved

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Last modified September 29 13:10 EDT 2023. Contains 365771 sequences. (Running on oeis4.)