A236159 Number of (n+1)X(3+1) 0..2 arrays colored with the sets of distinct values in every 2X2 subblock, with new values 0..2 introduced row-major order

358, 2688, 24428, 225216, 2085288, 19292888, 178764936, 1654241464, 15328190976, 141847742984, 1314327437536, 12163159796496, 112698090430280, 1042966073144728, 9663395442341880, 89432162049587368, 828596618144389304

Offset

1,1

Comments

Column 3 of A236164

Links

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

Formula

Empirical: a(n) = 91*a(n-2) +17*a(n-3) -555*a(n-4) -199*a(n-5) -2759*a(n-6) -806*a(n-7) +12016*a(n-8) +8767*a(n-9) +37038*a(n-10) +23107*a(n-11) -30178*a(n-12) -50102*a(n-13) -64316*a(n-14) -22746*a(n-15) -28056*a(n-16) +29816*a(n-17) -137392*a(n-18) -67760*a(n-19) -1568*a(n-20) -11584*a(n-21) +3392*a(n-22) -192*a(n-23) for n>26

Example

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

Crossrefs

Sequence in context: A278412 A278632 A108875 * A280403 A145533 A273806

Adjacent sequences: A236156 A236157 A236158 * A236160 A236161 A236162

Keyword

nonn

Author

R. H. Hardin, Jan 19 2014

Status

approved