login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A205516
Number of (n+1)X5 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock differing from each horizontal or vertical neighbor
1
7572, 122232, 2343348, 44160240, 825828828, 15535355076, 291860355624, 5480789967924, 102961205438196, 1934055528917952, 36329184190688802, 682418545352937906, 12818683603774987476, 240788570432946987510
OFFSET
1,1
COMMENTS
Column 4 of A205520
LINKS
FORMULA
Empirical: a(n) = 10*a(n-1) +58*a(n-2) +1410*a(n-3) +7163*a(n-4) +65793*a(n-5) +205637*a(n-6) +132235*a(n-7) +280626*a(n-8) -730704*a(n-9) +2679798*a(n-10) +8582778*a(n-11) -91684*a(n-12) +85261360*a(n-13) +321541259*a(n-14) +569443623*a(n-15) -732138925*a(n-16) -3664354834*a(n-17) +2203501471*a(n-18) -3753935283*a(n-19) -25922521769*a(n-20) -7334244007*a(n-21) -6317048901*a(n-22) +125898111939*a(n-23) +260238638290*a(n-24) +372802067843*a(n-25) +361274637040*a(n-26) -752682455700*a(n-27) -841898472719*a(n-28) -5074150622769*a(n-29) -1537943064308*a(n-30) -3735802052062*a(n-31) -4121472351844*a(n-32) +3872179025515*a(n-33) +20325772376636*a(n-34) -3524272470091*a(n-35) +9990833813224*a(n-36) +18538546805197*a(n-37) +31762981582390*a(n-38) +580882796102*a(n-39) -1207153629309*a(n-40) +81189313831926*a(n-41) -46547738884143*a(n-42) -42650902708584*a(n-43) -42602026330041*a(n-44) +84617727779089*a(n-45) -65946879086084*a(n-46) -60168443523097*a(n-47) -61814707076290*a(n-48) +26318484935886*a(n-49) +38754376314567*a(n-50) +27308069650872*a(n-51) -35314376277998*a(n-52) +12032327278080*a(n-53) +40108416929074*a(n-54) +111092495193695*a(n-55) -109866586682936*a(n-56) +145579921842545*a(n-57) -220346501355435*a(n-58) +151438668417153*a(n-59) -75996652811792*a(n-60) +22221513244964*a(n-61) -24986956093364*a(n-62) -39367240144691*a(n-63) +15039284979443*a(n-64) -2019472883152*a(n-65) +3532471439516*a(n-66) -8442802493012*a(n-67) -1631149642803*a(n-68) -1042203843201*a(n-69) +2412205601461*a(n-70) -1006682224604*a(n-71) -707831646116*a(n-72) -118260311594*a(n-73) -242779781986*a(n-74) +126081837785*a(n-75) -156519033074*a(n-76) -94405903653*a(n-77) -13495086885*a(n-78) -12778438805*a(n-79) +1785930579*a(n-80) -1583922542*a(n-81) -2154831758*a(n-82) +157351877*a(n-83) +46791613*a(n-84) -72730759*a(n-85) -3581632*a(n-86) +1056649*a(n-87) -433266*a(n-88) -39689*a(n-89) +27602*a(n-90) +2705*a(n-91) -74*a(n-92) for n>93
EXAMPLE
Some solutions for n=4
..1..1..1..1..1....1..1..0..2..1....0..0..1..1..2....2..1..1..1..0
..0..0..2..1..1....2..2..1..1..2....0..1..2..1..0....1..2..0..2..2
..2..1..1..0..0....1..0..0..2..2....2..1..1..2..2....1..1..0..1..0
..2..1..1..2..1....0..0..0..1..0....0..0..2..2..2....1..1..2..1..2
..0..2..0..1..1....2..1..2..1..1....2..1..2..2..0....2..2..0..0..1
CROSSREFS
Sequence in context: A031765 A205740 A206672 * A260036 A064872 A254909
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 28 2012
STATUS
approved