A228630 Number of s in {1,...,n}^n having shortest run with the same value of length 4.

4, 0, 0, 0, 56, 144, 180, 220, 1716, 5928, 14560, 26880, 97680, 344352, 978588, 2346120, 7444580, 25763640, 79547622, 213434848, 663024312, 2288434800, 7496808800, 21967834824, 68476484916, 235311849416, 802176548700, 2519791766160, 8048777883936

Offset

4,1

Links

Alois P. Heinz, Table of n, a(n) for n = 4..180

Example

a(4) = 4: [1,1,1,1], [2,2,2,2], [3,3,3,3], [4,4,4,4].
a(8) = 2*C(8,2) = 56: [1,1,1,1,2,2,2,2], ..., [8,8,8,8,7,7,7,7].

Crossrefs

Column k=4 of A228617.

Sequence in context: A169768 A057386 A099306 * A174647 A258644 A169770

Adjacent sequences: A228627 A228628 A228629 * A228631 A228632 A228633

Keyword

nonn

Author

Alois P. Heinz, Aug 28 2013

Status

approved