A245950 -id:A245950 - cp's OEIS frontend

A245956 Number of length 6+3 0..n arrays with some pair in every consecutive four terms totalling exactly n.

298, 11441, 88804, 525041, 1744494, 5208673, 12257032, 27206945, 53051890, 99643601, 172531308, 290962321, 464076214, 725751041, 1089854224, 1611694913, 2311078842, 3273303025, 4525364980, 6193054001, 8311825918, 11060605601

Offset: 1

R. H. Hardin, Aug 08 2014

nonn

Row 6 of A245950

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

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

Empirical: a(n) = 3*a(n-1) +2*a(n-2) -14*a(n-3) +5*a(n-4) +25*a(n-5) -20*a(n-6) -20*a(n-7) +25*a(n-8) +5*a(n-9) -14*a(n-10) +2*a(n-11) +3*a(n-12) -a(n-13)

A245957 Number of length 7+3 0..n arrays with some pair in every consecutive four terms totalling exactly n.

Original entry on oeis.org

548, 31577, 300304, 2141609, 7972932, 26526337, 67596992, 161991665, 335832580, 669329801, 1217929488, 2155659097, 3584230244, 5837790449, 9084731392, 13912683617, 20579766372, 30053056825, 42704873360, 60046213001, 82587911428

Offset: 1

R. H. Hardin, Aug 08 2014

nonn

Row 7 of A245950

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

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

Empirical: a(n) = 2*a(n-1) +5*a(n-2) -12*a(n-3) -9*a(n-4) +30*a(n-5) +5*a(n-6) -40*a(n-7) +5*a(n-8) +30*a(n-9) -9*a(n-10) -12*a(n-11) +5*a(n-12) +2*a(n-13) -a(n-14)

cp's OEIS Frontend

A245956 Number of length 6+3 0..n arrays with some pair in every consecutive four terms totalling exactly n.

Views

Author

Keywords

Comments

Examples

Links

Formula