A218598 - OEIS

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A218598

Hilltop maps: number of 7Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..2 7Xn array

1, 11011, 1782855, 227451273, 28782653703, 3663996495065, 467122877883141, 59564772010560679, 7594747878648617511, 968342656073731373915, 123465264778955860526245, 15742032324396343036237669

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

OFFSET

1,2

COMMENTS

Row 7 of A218592

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..21

EXAMPLE

Some solutions for n=3

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

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

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