A250377 Number of length 4+6 0..n arrays with every seven consecutive terms having the maximum of some three terms equal to the minimum of the remaining four terms

424, 16798, 202184, 1340867, 6202712, 22517208, 68640720, 183349893, 441598504, 978524338, 2024486872, 3954455687, 7355653592, 13117987436, 22552473504, 37543583241, 60742198824, 95806676806, 147700371688, 223054869835

Offset

1,1

Comments

Row 4 of A250373

Links

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

Formula

Empirical: a(n) = (13/105)*n^9 + (156/35)*n^8 + 31*n^7 + (2561/30)*n^6 + (626/5)*n^5 + (3197/30)*n^4 + (653/14)*n^3 + (1534/105)*n^2 + (271/30)*n + 1

Example

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

Crossrefs

Sequence in context: A220541 A091292 A184766 * A250342 A232359 A294714

Adjacent sequences: A250374 A250375 A250376 * A250378 A250379 A250380

Keyword

nonn

Author

R. H. Hardin, Nov 19 2014

Status

approved