A033903 Sort then Add, a(1)=27.

27, 54, 99, 198, 387, 765, 1332, 2565, 5121, 6246, 8712, 9990, 10989, 12888, 25776, 51453, 64908, 69597, 126396, 250065, 252621, 374877, 722655, 948222, 1170711, 1281888, 2410776, 2535453, 4870008, 4874796, 9342585, 11688174, 22834962

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Maple

A033903 := proc(n)
    option remember ;
    if n =1 then
        27;
    else
        A070196(procname(n-1)) ;
    end if;
end proc:
seq(A033903(n), n=1..100) ; # R. J. Mathar, Feb 03 2025

Mathematica

NestList[#+FromDigits[Sort[IntegerDigits[#]]]&, 27, 40] (* Harvey P. Dale, May 21 2023 *)

Crossrefs

Cf. A033860.

Sequence in context: A305548 A306824 A043323 * A175806 A232922 A306761

Adjacent sequences: A033900 A033901 A033902 * A033904 A033905 A033906

Keyword

nonn,base,easy

Author

N. J. A. Sloane, David W. Wilson

Status

approved