A236663 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the upper median plus the lower median of every 2X2 subblock

81, 518, 518, 3300, 5538, 3300, 21372, 58236, 58236, 21372, 138364, 631692, 1008315, 631692, 138364, 891832, 6798520, 18154174, 18154174, 6798520, 891832, 5750552, 72887588, 322686298, 553867544, 322686298, 72887588, 5750552, 37123784

Offset

1,1

Comments

Table starts

.........81.........518..........3300..........21372.........138364

........518........5538.........58236.........631692........6798520

.......3300.......58236.......1008315.......18154174......322686298

......21372......631692......18154174......553867544....16530497266

.....138364.....6798520.....322686298....16530497266...823226052124

.....891832....72887588....5708337224...490200821004.40687629591240

....5750552...782409904..101248959916.14607033795744

...37123784..8415647974.1800875699576

..239612080.90402273416

.1546031840

Links

R. H. Hardin, Table of n, a(n) for n = 1..60

Formula

Empirical for column k:

k=1: [linear recurrence of order 23]

Example

Some solutions for n=2 k=4
..0..0..0..1..0....0..0..1..0..1....0..0..0..1..0....0..0..1..2..0
..1..0..2..1..1....1..1..2..0..0....1..1..0..2..2....2..1..2..0..2
..0..2..0..0..0....0..2..0..0..0....0..1..2..1..2....1..2..2..0..1

Crossrefs

Sequence in context: A128912 A076090 A183428 * A236645 A253314 A253662

Adjacent sequences: A236660 A236661 A236662 * A236664 A236665 A236666

Keyword

nonn,tabl

Author

R. H. Hardin, Jan 29 2014

Status

approved