A232314 Number of (n+1)X(6+1) 0..1 arrays with every element equal to some horizontal or antidiagonal neighbor, with top left element zero.
549, 32089, 1905436, 113293694, 6736602042, 400571676322, 23818815015639, 1416315842358249, 84217060496525106, 5007720081104988709, 297769362466646214990, 17705980324085995012465, 1052834101669304585327957
Offset: 1
Keywords
Examples
Some.solutions.for.n=2 ..0..0..1..1..1..0..0....0..0..1..0..0..1..1....0..0..0..0..0..1..1 ..0..0..1..0..1..1..0....1..1..1..1..1..0..0....0..0..1..0..0..1..1 ..0..0..0..0..0..0..0....1..1..0..0..0..1..1....1..1..1..0..0..1..1
Links
- R. H. Hardin, Table of n, a(n) for n = 1..210
Formula
Empirical: a(n) = 72*a(n-1) -776*a(n-2) +1665*a(n-3) +9178*a(n-4) -25937*a(n-5) -66159*a(n-6) +136942*a(n-7) +220000*a(n-8) -272204*a(n-9) -190803*a(n-10) +93056*a(n-11) -91520*a(n-12) -19693*a(n-13) -8950*a(n-14) -5251*a(n-15) +211*a(n-16) -842*a(n-17) -172*a(n-18) for n>20
Comments