OFFSET
1,1
FORMULA
Conjecture: sequence always exists and there is a constant C=2.9... such that sum(k=1, n, a(k)) is asymptotic to C*n*Log(n). Is this constant the same as those for the sequence involving Pi instead of e?
PROG
(PARI) P=exp(1); a(n)=if(n<0, 0, s=n; t=2; while(floor(s/P^(-1)^s)>0, s=floor(s/P^(-1)^s); t++); t)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, Aug 23 2002
STATUS
approved