A213470 Number of 0..3 arrays of length 2*n+5 with sum less than 3*n in any length 2n subsequence (=less than 50% duty cycle).

353, 22506, 615561, 12773955, 237475982, 4198162231, 72188618371, 1220298706370, 20395481622380, 338170996357600, 5574396540683306, 91481580201645051, 1496133943774251078, 24401386122053197406, 397092484505964837242, 6450193163022177761972, 104613879499273682174696

Offset: 1

Author

R. H. Hardin, Jun 12 2012

Keywords

• nonn
• changed

Examples

			Some solutions for n=3:
..2....0....2....2....0....2....2....2....0....0....2....2....2....0....2....0
..2....0....0....2....0....0....2....2....2....2....2....0....2....0....2....2
..2....0....2....0....2....0....2....0....0....0....0....0....0....2....2....0
..2....2....0....0....2....3....1....1....2....1....1....0....0....2....0....2
..0....3....1....1....2....2....0....0....2....0....0....1....2....0....1....3
..0....1....1....0....0....0....0....0....1....0....3....1....0....0....1....0
..1....0....3....3....0....1....0....1....0....0....2....0....1....1....1....0
..3....1....1....2....1....0....1....1....0....1....1....1....0....0....1....1
..1....0....2....2....2....1....2....2....0....3....1....3....3....3....3....1
..0....3....0....0....2....3....3....1....1....1....0....1....2....1....0....1
..2....1....0....0....3....1....2....2....2....2....0....1....2....3....0....0
		

Links

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

Crossrefs

Row 6 of A213464.