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A228630
Number of s in {1,...,n}^n having shortest run with the same value of length 4.
2
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
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
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Aug 28 2013
STATUS
approved