A257059 Number of length n 1..(n+1) arrays with every leading partial sum divisible by 2 or 3.

1, 4, 18, 81, 1024, 7353, 106056, 1249592, 22143847, 282475249, 8589934592, 133642251792, 3531308221901, 71789886480657, 2171807721018968, 45949729863572161, 2218611106740436992, 53241469411989452625

Offset: 1

Author

R. H. Hardin, Apr 15 2015

Keywords

• nonn

Comments

Diagonal of A257062

Examples

			Some solutions for n=4
..3....4....2....2....3....3....4....4....4....2....2....3....4....2....3....4
..5....5....2....1....1....3....2....5....4....2....1....1....5....4....5....4
..2....5....2....5....2....3....2....3....1....5....5....4....5....2....4....4
..4....1....4....1....4....1....4....2....3....3....4....1....2....1....2....2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..93

Crossrefs

Cf. A257062