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 A238311 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 6
 256, 1776, 1776, 12372, 20128, 12372, 85984, 227622, 227622, 85984, 601408, 2570594, 4124382, 2570594, 601408, 4181152, 29039618, 73547936, 73547936, 29039618, 4181152, 29228452, 328887234, 1325192097, 2095353404, 1325192097 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ........256..........1776............12372.............85984.............601408 .......1776.........20128...........227622...........2570594...........29039618 ......12372........227622..........4124382..........73547936.........1325192097 ......85984.......2570594.........73547936........2095353404........60499288444 .....601408......29039618.......1325192097.......60499288444......2819884806312 ....4181152.....328887234......23867403810.....1753568482738....130981062733326 ...29228452....3724943100.....431525615512....50670612949420...6096647460404574 ..203246304...42156330796....7754964008116..1462889957511854.282303059762478196 .1421071696..477092412942..140102741116287.42268524829620522 .9880770000.5400733421386.2519445217835664 LINKS R. H. Hardin, Table of n, a(n) for n = 1..84 FORMULA Empirical for column k: k=1: [linear recurrence of order 26] k=2: [order 76] EXAMPLE Some solutions for n=2 k=4 ..0..0..3..1..0....0..0..0..2..0....0..0..2..2..1....0..0..2..1..0 ..1..2..0..3..0....0..0..1..0..3....1..0..1..3..0....1..1..0..2..0 ..0..1..0..1..1....1..1..1..2..1....1..3..0..2..2....3..0..1..3..2 CROSSREFS Sequence in context: A237780 A237904 A237899 * A205944 A238306 A205937 Adjacent sequences: A238308 A238309 A238310 * A238312 A238313 A238314 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Feb 24 2014 STATUS approved

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Last modified July 22 17:20 EDT 2024. Contains 374540 sequences. (Running on oeis4.)