A229561 Number of arrays of length n that are sums of 3 consecutive elements of length n+2 permutations of 0..n+1.

1, 12, 96, 304, 4416, 38520, 302400, 3540672, 39595392, 461376000

Offset

1,2

Comments

Column 3 of A229565.

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=3:
  5  5  3  5  8  7  8  9  6  5  6  3  5  5  8  8
  3  6  6  6  6  5  9  7  7  8  9  5  8  7  5  6
  5  8  8  9  3  3  6  4  4  9  8  8  6  8  3  5

Crossrefs

Cf. A229565.

Sequence in context: A059154 A204630 A192848 * A341233 A120658 A121627

Adjacent sequences: A229558 A229559 A229560 * A229562 A229563 A229564

Keyword

nonn

Author

R. H. Hardin, Sep 26 2013

Status

approved