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A259248 Number of (n+1)X(6+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0011 or 0111 1
588, 5216, 41552, 361728, 2964676, 25462352, 211569948, 1802996568, 15090948960, 128059095616, 1076133958644, 9111215773728, 76735453511764, 648920372600856, 5472076754002096, 46246969544401512, 390256929158755132 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A259250

LINKS

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

FORMULA

Empirical: a(n) = 18*a(n-1) +4*a(n-2) -1673*a(n-3) +5523*a(n-4) +59794*a(n-5) -285439*a(n-6) -1125159*a(n-7) +6632986*a(n-8) +12721025*a(n-9) -87684501*a(n-10) -94080286*a(n-11) +710791611*a(n-12) +488130615*a(n-13) -3604094066*a(n-14) -1833458263*a(n-15) +11326266573*a(n-16) +4724718346*a(n-17) -21581019805*a(n-18) -7446002885*a(n-19) +24486208594*a(n-20) +6596083231*a(n-21) -16015478187*a(n-22) -3007670078*a(n-23) +5645651298*a(n-24) +594934259*a(n-25) -947418958*a(n-26) -24710432*a(n-27) +60791760*a(n-28) -1899504*a(n-29) -988000*a(n-30) +58880*a(n-31)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Cf. A259250

Sequence in context: A230716 A211852 A178973 * A238519 A185884 A115487

Adjacent sequences:  A259245 A259246 A259247 * A259249 A259250 A259251

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 22 2015

STATUS

approved

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Last modified September 24 22:46 EDT 2021. Contains 347651 sequences. (Running on oeis4.)