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A229013 Number of arrays of median of three adjacent elements of some length-5 0..n array, with no adjacent equal elements in the latter. 1
2, 15, 46, 101, 186, 307, 470, 681, 946, 1271, 1662, 2125, 2666, 3291, 4006, 4817, 5730, 6751, 7886, 9141, 10522, 12035, 13686, 15481, 17426, 19527, 21790, 24221, 26826, 29611, 32582, 35745, 39106, 42671, 46446, 50437, 54650, 59091, 63766, 68681, 73842 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A229012.

LINKS

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

FORMULA

Empirical: a(n) = n^3 + 3*n^2 - 3*n + 1.

EXAMPLE

Some solutions for n=4:

..2....1....1....3....3....0....4....2....1....2....2....0....2....2....0....1

..1....4....0....0....4....1....2....1....2....1....4....2....2....0....3....3

..3....1....3....3....1....1....2....4....0....2....3....3....3....2....2....3

CROSSREFS

Sequence in context: A001007 A152015 A162256 * A256328 A041719 A133777

Adjacent sequences:  A229010 A229011 A229012 * A229014 A229015 A229016

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 10 2013

STATUS

approved

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Last modified February 18 20:32 EST 2018. Contains 299330 sequences. (Running on oeis4.)