A218807 Hilltop maps: number of nX5 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..3 nX5 array

29, 993, 31741, 1015637, 32496361, 1039771513, 33269071149, 1064494567893, 34060123730017, 1089805494659041, 34869985369949693, 1115718250329709413, 35699103424100012857, 1142247144301883171769, 36547935760902073717133

Offset

1,1

Comments

Column 5 of A218810

Links

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

Formula

Empirical: a(n) = 29*a(n-1) +88*a(n-2) +236*a(n-3) +503*a(n-4) +361*a(n-5) +156*a(n-6) -348*a(n-7) +73*a(n-8) -37*a(n-9) -36*a(n-10) -15*a(n-12) +15*a(n-13) for n>14

Example

Some solutions for n=3
..0..1..0..1..1....0..0..1..1..1....0..1..0..0..0....0..1..1..1..0
..1..1..1..1..0....1..1..1..1..1....0..0..1..1..1....1..1..0..0..0
..1..1..0..1..0....0..0..1..1..0....1..1..1..0..0....1..0..0..1..1

Crossrefs

Sequence in context: A107964 A096699 A316708 * A218193 A218369 A234602

Adjacent sequences: A218804 A218805 A218806 * A218808 A218809 A218810

Keyword

nonn

Author

R. H. Hardin Nov 06 2012

Status

approved