OFFSET
1,2
EXAMPLE
Among terms a(1) through a(5) there are three terms that divide 6: a(1)=1, a(2)=2 and a(3)=3. So a(6) = a(5) + 3 = 10.
MAPLE
A123885 := proc(maxn) local a, nexta, n, i; a := [1]; for n from 2 to maxn do nexta := op(n-1, a); for i from 1 to n-1 do if n mod op(i, a) = 0 then nexta := nexta +1; fi; od; a := [op(a), nexta]; od; RETURN(a); end: maxn := 100 : alist := A123885(maxn) : for i from 1 to maxn do printf("%d, ", op(i, alist)); end : # R. J. Mathar, Oct 21 2006
MATHEMATICA
f[l_List] := Append[l, Last[l] + Length[Select[l, Mod[Length[l] + 1, # ] == 0 &]]]; Nest[f, {1}, 63] (* Ray Chandler, Oct 19 2006 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Leroy Quet, Oct 17 2006
EXTENSIONS
Extended by Ray Chandler, Oct 19 2006
More terms from R. J. Mathar, Oct 21 2006
STATUS
approved