A210103 Number of (n+1)X5 0..2 arrays with every 2X2 subblock having one or three distinct values, and new values 0..2 introduced in row major order

614, 12725, 254314, 5115121, 102841182, 2068413037, 41604910322, 836912242697, 16835567508454, 338674538233541, 6813037960821306, 137056899213689121, 2757159785015774318, 55465567148672270109, 1115797113738320026498

Offset

1,1

Comments

Column 4 of A210107

Links

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

Formula

Empirical: a(n) = 39*a(n-1) -424*a(n-2) -100*a(n-3) +25342*a(n-4) -98910*a(n-5) -353224*a(n-6) +2683456*a(n-7) -679949*a(n-8) -24899773*a(n-9) +39419608*a(n-10) +84219756*a(n-11) -230024712*a(n-12) -56603460*a(n-13) +492890768*a(n-14) -143861456*a(n-15) -452015392*a(n-16) +208017984*a(n-17) +175455296*a(n-18) -65216128*a(n-19) -32317440*a(n-20) +2433024*a(n-21) +925696*a(n-22)

Example

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

Crossrefs

Sequence in context: A252615 A252616 A252607 * A191938 A195809 A252923

Adjacent sequences: A210100 A210101 A210102 * A210104 A210105 A210106

Keyword

nonn

Author

R. H. Hardin Mar 17 2012

Status

approved