A246735 Number of length n+4 0..6 arrays with no pair in any consecutive five terms totalling exactly 6.

3876, 15960, 66378, 276762, 1152576, 4791012, 19906740, 82727094, 343911336, 1430080296, 5946396012, 24722787264, 102780120750, 427285990662, 1776417823830, 7385542897866, 30705819911322, 127659940718424

Offset: 1

Author

R. H. Hardin, Sep 02 2014

Keywords

• nonn

Comments

Column 6 of A246737.

Examples

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

Links

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

Crossrefs

Cf. A246737.

Formula

Empirical: a(n) = 3*a(n-1) +a(n-2) +a(n-3) +5*a(n-4) +202*a(n-5) +94*a(n-6) +129*a(n-7) +278*a(n-8) +35*a(n-9) -197*a(n-10) -164*a(n-11) +272*a(n-12) +119*a(n-13) -9*a(n-14) +17*a(n-15) +158*a(n-16) +27*a(n-17) -19*a(n-18) -18*a(n-19) -a(n-20) -2*a(n-21) +2*a(n-22) +a(n-23).