A257017 T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with no 3x3 subblock diagonal sum equal to the antidiagonal sum

15066, 311364, 311364, 6508512, 14776336, 6508512, 136048896, 717382656, 717382656, 136048896, 2834352000, 34828517376, 82198167552, 34828517376, 2834352000, 59049000000, 1679616000000, 9418319069184, 9418319069184

Offset

1,1

Comments

Table starts

.....15066......311364.......6508512........136048896.........2834352000

....311364....14776336.....717382656......34828517376......1679616000000

...6508512...717382656...82198167552....9418319069184...1067360882688000

.136048896.34828517376.9418319069184.2546899517177856.678285544965341184

Links

R. H. Hardin, Table of n, a(n) for n = 1..59

Formula

Empirical for column k:

k=1: [linear recurrence of order 9]

k=2: [order 27]

Example

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

Crossrefs

Sequence in context: A187423 A186215 A347077 * A257014 A237335 A206410

Adjacent sequences: A257014 A257015 A257016 * A257018 A257019 A257020

Keyword

nonn,tabl

Author

R. H. Hardin, Apr 14 2015

Status

approved