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A302274 Number of n X 4 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 2
2, 10, 29, 89, 353, 941, 3316, 12016, 34060, 120940, 415304, 1257949, 4395268, 14710881, 46444038, 159674287, 528683443, 1709740974, 5804427370, 19154720511, 62771586925, 211230338251, 697032878924, 2300170434527, 7695594400341 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A302278.

LINKS

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

R. H. Hardin, Empirical recurrence of order 72

FORMULA

Empirical recurrence of order 72 (see link above)

EXAMPLE

Some solutions for n=5:

  0 0 1 1     0 1 0 1     0 0 1 0     0 0 1 0     0 1 1 1

  1 0 0 1     1 0 1 0     1 1 0 1     1 1 0 0     0 0 1 0

  0 1 0 1     1 0 1 0     1 0 1 0     0 1 0 0     0 0 0 0

  0 0 1 1     0 1 0 1     1 1 1 1     0 0 1 0     1 1 0 1

  0 0 1 1     0 0 0 0     0 0 0 0     0 0 1 1     0 0 1 0

CROSSREFS

Cf. A302278.

Sequence in context: A101561 A279263 A295525 * A047112 A190186 A032250

Adjacent sequences:  A302271 A302272 A302273 * A302275 A302276 A302277

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 04 2018

STATUS

approved

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Last modified September 26 12:54 EDT 2022. Contains 356998 sequences. (Running on oeis4.)