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A260471
Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00010101
1
205, 471, 1723, 5034, 15502, 51552, 161176, 500384, 1604536, 5086798, 15970826, 50628404, 160518794, 506646020, 1602247622, 5073114544, 16039699386, 50717541826, 160468331560, 507552451076, 1605133576768, 5077305382754
OFFSET
1,1
COMMENTS
Column 4 of A260475
LINKS
FORMULA
Empirical: a(n) = a(n-1) +2*a(n-2) +16*a(n-3) +7*a(n-4) -14*a(n-5) -45*a(n-6) -14*a(n-7) +7*a(n-8) +42*a(n-9) +10*a(n-10) -37*a(n-11) -82*a(n-12) -25*a(n-13) +110*a(n-14) +169*a(n-15) +20*a(n-16) -71*a(n-17) -88*a(n-18) -20*a(n-19) +58*a(n-20) +83*a(n-21) +72*a(n-22) -60*a(n-23) -79*a(n-24) -63*a(n-25) +4*a(n-26) +16*a(n-27) +10*a(n-28) for n>32
EXAMPLE
Some solutions for n=4
..0..1..0..0..0..0....1..0..0..0..1..0....1..0..0..0..0..0....1..0..0..0..0..0
..1..0..1..0..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..0..0....0..0..0..0..0..1....0..0..0..0..0..0
..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....1..0..0..1..0..0....0..1..0..0..0..0....0..0..0..0..0..0
..1..0..1..0..0..0....0..0..0..0..0..0....1..0..0..0..1..0....0..0..0..0..1..0
CROSSREFS
Sequence in context: A042983 A186475 A020170 * A249703 A015974 A203870
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 26 2015
STATUS
approved