OFFSET
1,3
COMMENTS
A descent is an element j in {1,2,...,n-1} such that f(j) > f(j+1).
FORMULA
a(n) = (n + 1/n -2)*n^n/2 = A062023(n) - n^n.
MATHEMATICA
Table[(n + 1/n -2)*n^n/2, {n, 1, 20}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Geoffrey Critzer, Jun 26 2013
STATUS
approved