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A224684 Number of (n+4)X6 0..1 matrices with each 5X5 subblock idempotent 1
2351, 1312, 1494, 1720, 1938, 2110, 2591, 3332, 4377, 5599, 6968, 8749, 11314, 14818, 19530, 25558, 33366, 43649, 57438, 75842, 100289, 132470, 174892, 231022, 305587, 404481, 535530, 708936, 938459, 1242445, 1645315, 2179125, 2886344, 3823000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A224690

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) -a(n-2) +a(n-3) -a(n-4) -a(n-7) +a(n-8) -a(n-9) +a(n-10) +a(n-12) -a(n-13) for n>18

EXAMPLE

Some solutions for n=2

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

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

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

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

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

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

CROSSREFS

Sequence in context: A281697 A045306 A264943 * A198047 A179137 A003552

Adjacent sequences:  A224681 A224682 A224683 * A224685 A224686 A224687

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 15 2013

STATUS

approved

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Last modified November 27 03:56 EST 2021. Contains 349345 sequences. (Running on oeis4.)