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A263120 Number of (n+3)X(2+3) 0..1 arrays with each row divisible by 15 and column not divisible by 15, read as a binary number with top and left being the most significant bits. 1
36, 148, 522, 1708, 5124, 15640, 47602, 144236, 432708, 1295524, 3883594, 11649676, 34949028, 104703688, 313818418, 940969804, 2822909412, 8465899188, 25390861962, 76159749740, 228479249220, 685409187320, 2056136698226 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A263124.

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) -a(n-2) -8*a(n-3) +48*a(n-4) -168*a(n-5) +48*a(n-6) +312*a(n-7) -955*a(n-8) +2884*a(n-9) -955*a(n-10) -4832*a(n-11) +7632*a(n-12) -16032*a(n-13) +7632*a(n-14) +17568*a(n-15) +4886*a(n-16) -72248*a(n-17) +4886*a(n-18) +197200*a(n-19) -366336*a(n-20) +873744*a(n-21) -366336*a(n-22) -1155888*a(n-23) +1014058*a(n-24) -588568*a(n-25) +1014058*a(n-26) -2290528*a(n-27) +6020160*a(n-28) -17209056*a(n-29) +6020160*a(n-30) +27546528*a(n-31) -27604133*a(n-32) +27776948*a(n-33) -27604133*a(n-34) +27085688*a(n-35) -75797424*a(n-36) +221932632*a(n-37) -75797424*a(n-38) -362608200*a(n-39) +362785825*a(n-40) -363318700*a(n-41) +362785825*a(n-42) -361187200*a(n-43) +406335600*a(n-44) -541780800*a(n-45) +406335600*a(n-46)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

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

CROSSREFS

Cf. A263124.

Sequence in context: A003848 A203753 A039495 * A034592 A160754 A275496

Adjacent sequences:  A263117 A263118 A263119 * A263121 A263122 A263123

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 10 2015

STATUS

approved

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Last modified September 26 16:43 EDT 2020. Contains 337374 sequences. (Running on oeis4.)