Voozh

A234157

Number of (n+1)X(4+1) 0..3 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.

5446, 208530, 7952532, 305867942, 11788446834, 454899880956, 17566272589090, 678657896630666, 26228432144965180, 1013926534125410910, 39203657407973012450, 1516046883452164086780, 58633986736678853197346

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 4 of A234161

LINKS

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

FORMULA

Empirical: a(n) = 90*a(n-1) -2653*a(n-2) +24943*a(n-3) +89825*a(n-4) -2218609*a(n-5) +1432019*a(n-6) +71490923*a(n-7) -78048525*a(n-8) -1164227315*a(n-9) +761044775*a(n-10) +9924372783*a(n-11) -667076603*a(n-12) -41948446347*a(n-13) -15809876567*a(n-14) +78900501505*a(n-15) +41327430666*a(n-16) -75139994803*a(n-17) -37071907734*a(n-18) +40119015622*a(n-19) +12686351262*a(n-20) -12371945864*a(n-21) -754232304*a(n-22) +1729058752*a(n-23) -288379744*a(n-24) -6642240*a(n-25) +2957184*a(n-26)

EXAMPLE

Some solutions for n=1

..2..3..2..2..3....2..2..2..1..0....2..2..1..2..2....0..1..2..1..1

..2..3..3..2..2....1..1..1..1..1....2..2..1..1..2....1..1..2..1..2

CROSSREFS

Sequence in context: A124629 A222696 A125016 * A204474 A251052 A259514

Adjacent sequences: A234154 A234155 A234156 * A234158 A234159 A234160

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 20 2013

STATUS

approved

URL: https://oeis.org/A234157

⇱ A234157 - OEIS