A209844 Number of (n+1)X5 0..3 arrays with every 2X2 subblock having one or two distinct values, and new values 0..3 introduced in row major order

1331, 59563, 2713195, 128454587, 6168792219, 299013108267, 14575079152523, 713014417713003, 34962135163411115, 1716944820423706411, 84400236210902350123, 4151550346703285808683, 204295483850467630497195

Offset

1,1

Comments

Column 4 of A209848

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 101*a(n-1) -3119*a(n-2) +23301*a(n-3) +332146*a(n-4) -4841510*a(n-5) +189458*a(n-6) +228888364*a(n-7) -753564284*a(n-8) -2816048344*a(n-9) +16949078144*a(n-10) -1771169504*a(n-11) -117752841744*a(n-12) +156873217312*a(n-13) +244896903072*a(n-14) -582512363712*a(n-15) -47046663680*a(n-16) +765499169280*a(n-17) -294034673664*a(n-18) -383848898560*a(n-19) +236348588032*a(n-20) +55918985216*a(n-21) -46495170560*a(n-22) -1491075072*a(n-23) +1811939328*a(n-24)

Example

Some solutions for n=4
..0..0..0..0..1....0..1..2..1..3....0..1..1..1..1....0..0..0..1..1
..1..1..1..0..0....0..1..1..1..3....0..0..0..0..1....0..2..0..1..0
..2..1..1..0..3....1..0..0..1..3....2..0..0..1..0....2..2..0..0..1
..1..1..1..0..3....0..1..0..1..3....0..2..0..0..0....0..2..0..0..0
..2..1..1..0..0....0..0..1..1..1....2..0..0..1..1....2..0..0..3..0

Crossrefs

Sequence in context: A017283 A017391 A017655 * A227475 A375234 A036528

Adjacent sequences: A209841 A209842 A209843 * A209845 A209846 A209847

Keyword

nonn

Author

R. H. Hardin Mar 14 2012

Status

approved