login
A237927
T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one
6
256, 1632, 1632, 10316, 15260, 10316, 66512, 142488, 142488, 66512, 431640, 1365710, 1926461, 1365710, 431640, 2776536, 13009850, 26467386, 26467386, 13009850, 2776536, 17920936, 123407764, 362996768, 533139326, 362996768
OFFSET
1,1
COMMENTS
Table starts
........256..........1632...........10316............66512...........431640
.......1632.........15260..........142488..........1365710.........13009850
......10316........142488.........1926461.........26467386........362996768
......66512.......1365710........26467386........533139326......10733520644
.....431640......13009850.......362996768......10733520644.....318431976402
....2776536.....123407764......4957001920.....216277393666....9401494272628
...17920936....1173616996.....68164733860....4367587791906..279092830922873
..115383848...11179776830....934379485016...88165105669262.8254890731634348
..745952272..106365553324..12832924363235.1776627602822848
.4801239096.1011373253330.175593729622252
LINKS
FORMULA
Empirical for column k:
k=1: [linear recurrence of order 30]
k=2: [order 93]
EXAMPLE
Some solutions for n=2 k=4
..0..0..3..3..1....0..0..0..3..1....0..2..1..1..3....0..2..2..0..3
..2..3..1..2..1....3..2..2..0..2....2..0..1..0..0....0..1..0..1..0
..1..0..0..3..2....1..1..1..3..3....0..3..1..2..2....1..0..2..1..1
CROSSREFS
Sequence in context: A250429 A238155 A238148 * A237922 A238072 A238065
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 15 2014
STATUS
approved