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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. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A285030.

LINKS

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

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.

Sequence in context: A191821 A290958 A323265 * A192403 A282618 A192435

Adjacent sequences:  A285021 A285022 A285023 * A285025 A285026 A285027

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 08 2017

STATUS

approved

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Last modified May 18 02:59 EDT 2021. Contains 343992 sequences. (Running on oeis4.)