A268473 Number of 4Xn arrays containing n copies of 0..4-1 with column sums equal.

24, 648, 19584, 643680, 22374144, 807480576, 29933494272, 1132434556416, 43535117537280, 1695501057650688, 66738461036838912, 2650278622026645504, 106030560469874245632, 4268836144498501877760, 172798003474832717512704

Offset

1,1

Comments

Row 4 of A268472.

Links

R. H. Hardin, Table of n, a(n) for n = 1..188

Example

Some solutions for n=3
..2..0..3. .3..3..1. .3..2..0. .2..0..2. .3..2..3. .1..2..3. .1..0..3
..1..2..1. .2..1..2. .0..3..2. .1..2..1. .1..1..1. .0..1..3. .0..1..2
..3..3..2. .0..0..0. .1..1..3. .0..3..0. .2..3..0. .3..1..0. .3..2..1
..0..1..0. .1..2..3. .2..0..1. .3..1..3. .0..0..2. .2..2..0. .2..3..0

Crossrefs

Cf. A268472.

Sequence in context: A276246 A274957 A288816 * A367331 A291066 A160038

Adjacent sequences: A268470 A268471 A268472 * A268474 A268475 A268476

Keyword

nonn

Author

R. H. Hardin, Feb 05 2016

Status

approved