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A283199 Number of nX4 0..1 arrays with no 1 equal to more than two of its horizontal and vertical neighbors, with the exception of exactly one element. 1
0, 36, 868, 16048, 263232, 4024168, 59065412, 842673912, 11773250320, 161892233968, 2198435672418, 29552995134884, 393966089929078, 5215183090921300, 68625735079009304, 898401203984951940 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 4 of A283203.

LINKS

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

FORMULA

Empirical: a(n) = 18*a(n-1) -29*a(n-2) -174*a(n-3) -2976*a(n-4) -10280*a(n-5) -36327*a(n-6) -51166*a(n-7) -56733*a(n-8) +136728*a(n-9) +273529*a(n-10) +380780*a(n-11) -354170*a(n-12) -439798*a(n-13) +535820*a(n-14) -171074*a(n-15) -742999*a(n-16) +341418*a(n-17) +261472*a(n-18) -563536*a(n-19) -56145*a(n-20) +338242*a(n-21) -109804*a(n-22) -133254*a(n-23) +120176*a(n-24) +33588*a(n-25) -61637*a(n-26) +4672*a(n-27) +25732*a(n-28) -4460*a(n-29) -7460*a(n-30) +728*a(n-31) +1116*a(n-32) -32*a(n-33) -64*a(n-34)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A283203.

Sequence in context: A122038 A222926 A204101 * A346323 A243569 A145150

Adjacent sequences:  A283196 A283197 A283198 * A283200 A283201 A283202

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 02 2017

STATUS

approved

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Last modified December 4 09:10 EST 2021. Contains 349484 sequences. (Running on oeis4.)