A205317 Number of (n+1)X8 0..1 arrays with every 2X2 subblock having the same number of equal edges, and new values 0..1 introduced in row major order.

4376, 161928, 6150512, 235994088, 9094954742, 351210375464, 13574876544398, 524918733085720, 20301876944832818, 785274659708798830, 30375704525543067782, 1175006427763697066728, 45452565752953792429196

Offset: 1

Author

R. H. Hardin Jan 25 2012

Keywords

• nonn

Comments

Column 7 of A205318

Examples

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

Links

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

Formula

Empirical: a(n) = 106*a(n-1) -4578*a(n-2) +110127*a(n-3) -1685691*a(n-4) [phone]*a(n-5) -132490685*a(n-6) [phone]*a(n-7) -3041749572*a(n-8) [phone]*a(n-9) -23244897123*a(n-10) [phone]*a(n-11) -61676422325*a(n-12) [phone]*a(n-13) -55515488409*a(n-14) [phone]*a(n-15) -15313024644*a(n-16) [phone]*a(n-17) -999456992*a(n-18) [phone]*a(n-19) -6527616*a(n-20)