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A251256 Number of (n+1)X(6+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge 1
394, 3602, 21088, 192442, 1215600, 10753448, 71459218, 612889014, 4229034766, 35355603854, 250941567996, 2056162754024, 14904673137346, 120250782584654, 885430871478960, 7060080136304672, 52591558418232374, 415635038513014546 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A251258

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 10*a(n-1) +88*a(n-2) -1066*a(n-3) -2400*a(n-4) +43830*a(n-5) +13298*a(n-6) -943862*a(n-7) +547712*a(n-8) +11941908*a(n-9) -12796626*a(n-10) -93281376*a(n-11) +129279020*a(n-12) +457898585*a(n-13) -740494188*a(n-14) -1411719638*a(n-15) +2571931219*a(n-16) +2696954146*a(n-17) -5536013172*a(n-18) -3101668692*a(n-19) +7418845564*a(n-20) +2005636085*a(n-21) -6136576490*a(n-22) -582560336*a(n-23) +3057285154*a(n-24) -36877834*a(n-25) -868658898*a(n-26) +66666496*a(n-27) +125088368*a(n-28) -14449904*a(n-29) -6753024*a(n-30) +994560*a(n-31)

EXAMPLE

Some solutions for n=4

..0..0..1..1..0..1..1....0..1..1..0..1..0..1....1..0..0..0..0..0..0

..1..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..1..1..1..1..1

..1..0..1..1..1..1..1....1..0..1..0..1..1..0....1..0..0..0..0..0..0

..0..0..0..0..0..0..0....0..0..1..0..0..0..0....1..0..1..1..1..0..1

..0..1..1..0..1..1..1....1..0..1..0..1..0..1....0..0..0..0..0..0..1

CROSSREFS

Sequence in context: A252691 A051986 A223908 * A270843 A267965 A268030

Adjacent sequences:  A251253 A251254 A251255 * A251257 A251258 A251259

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 01 2014

STATUS

approved

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Last modified December 4 04:45 EST 2021. Contains 349469 sequences. (Running on oeis4.)