A218239 - OEIS

A218239

Hilltop maps: number of nX5 binary arrays indicating the locations of corresponding elements not exceeded by any king-move neighbor in a random 0..3 nX5 array

29, 1017, 32753, 1048545, 33552513, 1073678481, 34357707105, 1099446617025, 35182291517157, 1125833320760065, 36026666013866385, 1152853304425906241, 36891305485062692561, 1180521767311893767793, 37776696291257030450753

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OFFSET

1,1

COMMENTS

Column 5 of A218242

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..73

FORMULA

Empirical: a(n) = 30*a(n-1) +60*a(n-2) +120*a(n-3) +239*a(n-4) +506*a(n-5) +1124*a(n-6) +2696*a(n-7) -207*a(n-8) -412*a(n-9) -644*a(n-10) -207*a(n-12) -764*a(n-13) -1692*a(n-14) +117*a(n-16) +262*a(n-17) +117*a(n-20) +378*a(n-21) -29*a(n-24) -29*a(n-28)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A234602 A099931 A218635 * A132058 A210261 A138660

Adjacent sequences: A218236 A218237 A218238 * A218240 A218241 A218242

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 24 2012

STATUS

approved