A221060 - OEIS

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A221060

Equals one maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..3 nX4 array

8, 172, 3322, 58710, 989020, 16261308, 263988148, 4256750870, 68391745316, 1096704806282, 17568167732952, 281269561878252, 4501843454461912, 72042583248803298, 1152793219615408052, 18445647830197379358

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 4 of A221062

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..176

FORMULA

Empirical: a(n) = 38*a(n-1) -527*a(n-2) +3412*a(n-3) -10701*a(n-4) +15146*a(n-5) -10333*a(n-6) +12220*a(n-7) -16455*a(n-8) +6382*a(n-9) -2097*a(n-10) +1296*a(n-11) for n>14

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A333036 A247729 A333460 * A303285 A061492 A263461

Adjacent sequences: A221057 A221058 A221059 * A221061 A221062 A221063

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 31 2012

STATUS

approved