The On-Line Encyclopedia of Integer Sequences (OEIS)

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A285024

Number of n X 2 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.
(history; published version)

#6 by Wesley Ivan Hurt at Sun Apr 05 23:05:28 EDT 2020

STATUS

editing

approved

#5 by Wesley Ivan Hurt at Sun Apr 05 23:05:14 EDT 2020

NAME

Number of nX2 n X 2 0..1 arrays with the number of 1s 1's horizontally, antidiagonally or vertically adjacent to some 0 one less than the number of 0s 0's adjacent to some 1.

STATUS

approved

editing

#4 by R. H. Hardin at Sat Apr 08 09:40:00 EDT 2017

STATUS

editing

approved

#3 by R. H. Hardin at Sat Apr 08 09:39:57 EDT 2017

LINKS

R. H. Hardin, <a href="/A285024/b285024.txt">Table of n, a(n) for n = 1..210</a>

#2 by R. H. Hardin at Sat Apr 08 09:39:26 EDT 2017

NAME

allocated for R. H. Hardin

Number of nX2 0..1 arrays with the number of 1s horizontally, antidiagonally or vertically adjacent to some 0 one less than the number of 0s adjacent to some 1.

DATA

0, 2, 6, 26, 104, 402, 1578, 6196, 24310, 95446, 374872, 1472938, 5790024, 22768624, 89562540, 352395768, 1386874908, 5459330780, 21494802570, 84648191106, 333419873528, 1313575442496, 5176174458602, 20401118165166, 80425006887898

OFFSET

1,2

COMMENTS

Column 2 of A285030.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A285030.

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin, Apr 08 2017

STATUS

approved

editing

#1 by R. H. Hardin at Sat Apr 08 09:35:50 EDT 2017

NAME

allocated for R. H. Hardin

KEYWORD

allocated

STATUS

approved