A228739 Number of arrays of the median of three adjacent elements of some length n+2 0..7 array.

8, 64, 512, 3312, 17088, 84288, 410828, 2037214, 10282648, 52493640, 269103944, 1379300658, 7060313768, 36093818956, 184394586102, 941828553348, 4810728325582, 24575097951832, 125549549795310, 641435496947444

Offset

1,1

Comments

Column 7 of A228740

Links

R. H. Hardin, Table of n, a(n) for n = 1..69

Example

Some solutions for n=4
..2..1..7..5..3..1..4..4..1..5..5..4..4..6..2..5
..2..1..4..5..7..0..3..6..1..1..1..4..2..4..2..1
..3..1..1..4..3..3..5..3..1..3..1..5..6..0..1..6
..3..3..3..5..1..3..3..5..5..3..2..4..6..2..2..3

Crossrefs

Sequence in context: A171282 A125498 A193539 * A267730 A189155 A189337

Adjacent sequences: A228736 A228737 A228738 * A228740 A228741 A228742

Keyword

nonn

Author

R. H. Hardin Sep 01 2013

Status

approved