A258957 T(n,k) = Number of (n+3) X (k+3) 0..1 arrays with no 4 X 4 subblock diagonal sum not equal the antidiagonal sum.

17920, 80000, 80000, 357600, 213920, 357600, 1645856, 605904, 605904, 1645856, 7668960, 1724976, 1188294, 1724976, 7668960, 35887648, 4964896, 2292662, 2292662, 4964896, 35887648, 169347520, 14867112, 4268548, 2864828, 4268548

Offset

1,1

Comments

Table starts

.......17920......80000....357600..1645856.7668960.35887648.169347520.803828768

.......80000.....213920....605904..1724976.4964896.14867112..44522440.134384448

......357600.....605904...1188294..2292662.4268548..8889408..18461564..38504536

.....1645856....1724976...2292662..2864828.3415506..4910670...6869922...9782192

.....7668960....4964896...4268548..3415506.2618602..2593544...2456098...2490028

....35887648...14867112...8889408..4910670.2593544..1910774...1416722...1288390

...169347520...44522440..18461564..6869922.2456098..1416722....918188....890370

...803828768..134384448..38504536..9782192.2490028..1288390....890370....973994

..3829693280..410930808..81927058.14339074.2643922..1218684....811958....881974

.18318594784.1260815840.175124024.21420810.3075602..1472988...1035056...1143938

Links

R. H. Hardin, Table of n, a(n) for n = 1..362

Formula

Empirical for column k:

k=1: [linear recurrence of order 23]

Example

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

Crossrefs

Sequence in context: A250078 A165106 A205661 * A258950 A258949 A205950

Adjacent sequences: A258954 A258955 A258956 * A258958 A258959 A258960

Keyword

nonn,tabl

Author

R. H. Hardin, Jun 15 2015

Status

approved