cp's OEIS Frontend

A335855 a(n) = a(a(n-1)) + a(floor(n/a(n-1))) with a(1) = a(2) = a(3) = a(4) = 2.

%I A335855 #11 Jul 10 2020 04:21:51
%S A335855 2,2,2,2,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,6,6,6,6,6,6,6,6,6,6,8,6,8,6,8,
%T A335855 6,8,6,8,6,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
%U A335855 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
%N A335855 a(n) = a(a(n-1)) + a(floor(n/a(n-1))) with a(1) = a(2) = a(3) = a(4) = 2.
%H A335855 Altug Alkan, <a href="/A335855/b335855.txt">Table of n, a(n) for n = 1..10000</a>
%t A335855 a[1] = a[2] = a[3] = a[4] = 2; a[n_] := a[n] = a[a[n-1]] + a[Floor[n / a[n-1]]]; Array[a, 100] (* _Amiram Eldar_, Jun 27 2020 *)
%o A335855 (PARI) a=vector(10^2); a[1]=a[2]=a[3]=a[4]=2; for(n=5, #a, a[n]=a[n\a[n-1]]+a[a[n-1]]); a
%Y A335855 Cf. A004001, A283207.
%K A335855 nonn,easy
%O A335855 1,1
%A A335855 _Altug Alkan_, Jun 27 2020