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A146414 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-1000 pattern in any orientation. 0
1, 1, 1, 1, 5, 1, 29, 11, 724, 325, 31142, 7645, 1978797, 300177, 263468079, 35068989, 83745434537, 8987242465, 57534772999525, 4827346731624, 81084039874056659, 5040256291437877, 231986761011592759892, 10850930640918160916 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

Maximal 8 X 8 example:

  0 0 0 0 0 0 0 0

  0 0 0 0 0 0 0 0

  0 0 0 0 0 0 0 0

  0 0 0 0 0 0 0 0

  0 1 0 0 0 0 1 0

  0 1 0 0 0 0 1 0

  0 1 0 0 0 0 1 0

  1 1 1 0 0 1 1 1

CROSSREFS

Sequence in context: A096645 A140713 A125906 * A146374 A188647 A232015

Adjacent sequences:  A146411 A146412 A146413 * A146415 A146416 A146417

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified July 20 22:20 EDT 2019. Contains 325189 sequences. (Running on oeis4.)