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A222604 Number of nX1 0..3 arrays with exactly floor(nX1/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..3 order 5
1, 0, 0, 6, 20, 20, 70, 685, 2808, 5370, 21294, 123410, 514792, 1341616, 5472216, 25106526, 105042770, 321557310, 1329068686, 5447475968, 22826820144, 76079350800, 316839140020, 1228204709225, 5153985361728, 17971182592538 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Column 1 of A222608

LINKS

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

CROSSREFS

Sequence in context: A007253 A096897 A063601 * A112809 A289659 A237043

Adjacent sequences:  A222601 A222602 A222603 * A222605 A222606 A222607

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 26 2013

STATUS

approved

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Last modified July 29 03:57 EDT 2021. Contains 346340 sequences. (Running on oeis4.)