OFFSET
1,4
FORMULA
a(n)=floor(sum(j=1, n-1, j*a(j))/(n-1))
EXAMPLE
The sequence opens 1,1,1,2,3,5. a(7) = floor((1*1 + 2*1 + 3*1 + 4*2 + 5*3 + 6*5)/6) = floor((1 + 2 + 3 + 8 + 15 + 30)/6) = floor(59/6) = 9.
PROG
(PARI) for(i=2, 50, v[i]=floor(sum(j=1, i-1, j*v[j])/(i-1)))
CROSSREFS
KEYWORD
nonn
AUTHOR
Jon Perry, Apr 04 2004
STATUS
approved