A120203 a(1) = 2; a(n) = floor( (19 + Sum_{i=1..n-1} a(i)) /9).

2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 6, 7, 7, 8, 9, 10, 11, 12, 14, 15, 17, 19, 21, 23, 26, 29, 32, 36, 40, 44, 49, 54, 60, 67, 74, 83, 92, 102, 113, 126, 140, 156, 173, 192, 213, 237, 263, 293, 325, 361, 401, 446, 496, 551, 612

Offset: 1

Author

Graeme McRae, Jun 10 2006

Keywords

• nonn

Crossrefs

Cf. A073941, A112088, A072493.

Programs

Maple

A120203 := proc(n)
    option remember;
    if n = 1 then
        2;
    else
        floor( (19+ add(procname(i),i=1..n-1))/9) ;
    end if;
end proc: # R. J. Mathar, Jul 12 2012

Mathematica

f[s_] := Append[s, Floor[(19 + Plus @@ s)/9]]; Nest[f, {2}, 60] (* Robert G. Wilson v, Jul 08 2006 *)