A268421 Number of nX4 0..3 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal to the previous repeated value, and new values introduced in row-major sequential order.

12, 2191, 494098, 92967597, 15615613747, 2414369699870, 350815694801710, 48579100267639483, 6474432977080854160, 836528598526349043093, 105356335957177414141417, 12989039321265021304747296

Offset

1,1

Comments

Column 4 of A268423.

Links

R. H. Hardin, Table of n, a(n) for n = 1..43

Example

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

Crossrefs

Cf. A268423.

Sequence in context: A205157 A268071 A205306 * A129206 A135398 A203426

Adjacent sequences: A268418 A268419 A268420 * A268422 A268423 A268424

Keyword

nonn

Author

R. H. Hardin, Feb 04 2016

Status

approved