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A245160 Number of length n 0..5 arrays with new values introduced in order from both ends 1
1, 1, 2, 4, 9, 23, 65, 199, 654, 2296, 8569, 33825, 140580, 612890, 2794159, 13280627, 65597882, 335521900, 1770176005, 9593485125, 53183385680, 300371056446, 1721926382427, 9987133305239, 58446578859494, 344361988828048 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 5 of A245163

LINKS

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

FORMULA

Empirical: a(n) = 26*a(n-1) -290*a(n-2) +1820*a(n-3) -7073*a(n-4) +17618*a(n-5) -28060*a(n-6) +27480*a(n-7) -14976*a(n-8) +3456*a(n-9) for n>10

EXAMPLE

Some solutions for n=7

..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0

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

..1....2....1....0....0....0....0....0....1....2....1....0....0....2....1....1

..0....2....0....0....2....1....0....1....2....2....2....0....1....2....2....2

..2....2....0....0....0....0....0....0....0....0....1....1....1....1....2....2

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

..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0

CROSSREFS

Sequence in context: A014137 A245158 A245159 * A245161 A245162 A007476

Adjacent sequences:  A245157 A245158 A245159 * A245161 A245162 A245163

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 12 2014

STATUS

approved

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Last modified October 16 14:35 EDT 2018. Contains 316263 sequences. (Running on oeis4.)