A222604 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

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

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