A200666 Number of 0..6 arrays x(0..n-1) of n elements with each no smaller than the sum of its three previous neighbors modulo 7.

7, 28, 112, 448, 1813, 7322, 29536, 119066, 479993, 1935168, 7802161, 31456852, 126827111, 511338342, 2061602939, 8311924900, 33511832745, 135112262286, 544742594039, 2196280995578, 8854916583356, 35701054472646, 143938712300001

Offset: 1

Author

R. H. Hardin, Nov 20 2011

Keywords

• nonn

Examples

			Some solutions for n=6:
..1....3....1....4....0....4....4....2....5....4....1....2....1....4....0....2
..6....4....3....6....4....6....4....5....5....6....1....3....4....6....0....5
..1....4....4....3....5....3....4....1....5....4....5....6....6....4....3....0
..6....6....2....6....5....6....6....1....4....0....4....5....4....6....6....4
..6....6....2....1....6....5....4....4....6....5....6....5....0....5....2....6
..6....3....5....5....2....1....5....6....6....5....6....5....5....6....5....6
		

Links

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

Crossrefs

Column 6 of A200668.