A232293 Number of nX6 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally.

73, 22387, 5546705, 1370434057, 339565321435, 84130295708483, 20843967523877175, 5164265865545602229, 1279489656786836660869, 317004164359535173194891, 78540408423251444575629653

Offset: 1

Author

R. H. Hardin, Nov 22 2013

Keywords

• nonn

Comments

Column 6 of A232295

Examples

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

Links

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

Formula

Empirical: a(n) = 207*a(n-1) +9931*a(n-2) +49471*a(n-3) -1970447*a(n-4) -6338773*a(n-5) [phone]*a(n-6) -920603783*a(n-7) -9449384612*a(n-8) [phone]*a(n-9) -242636870053*a(n-10) -2073861584922*a(n-11) [phone]*a(n-12) [phone]*a(n-13) -343777801220144*a(n-14) [phone]*a(n-15) -1108971977347717*a(n-16) [phone]*a(n-17) [phone]*a(n-18) -705353078988810*a(n-19) -550826901103545*a(n-20) [phone]*a(n-21) [phone]*a(n-22) -337136081814506*a(n-23) -23122145009777*a(n-24) [phone]*a(n-25) [phone]*a(n-26) -24580209914500*a(n-27) -2718319844797*a(n-28) [phone]*a(n-29) [phone]*a(n-30) -285686783391*a(n-31) -152692917012*a(n-32) -22226924736*a(n-33) [phone]*a(n-34) [phone]*a(n-35) [phone]*a(n-36) +2985984*a(n-37) for n>38