A300608 - OEIS

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A300608

Number of n X 4 0..1 arrays with every element equal to 1, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1

2, 30, 277, 2347, 19532, 164619, 1387896, 11697909, 98591087, 830954473, 7003554684, 59028229212, 497509382092, 4193173792143, 35341458756838, 297869535158874, 2510543242339775, 21159691214336637, 178340896550028412

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 4 of A300612.

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

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

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

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

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

CROSSREFS

Sequence in context: A368498 A300423 A300685 * A301350 A036351 A189770

Adjacent sequences: A300605 A300606 A300607 * A300609 A300610 A300611

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 09 2018

STATUS

approved