A036228 a(1) = 31; a(n+1) = a(n) + sum of decimal digits of a(n).

31, 35, 43, 50, 55, 65, 76, 89, 106, 113, 118, 128, 139, 152, 160, 167, 181, 191, 202, 206, 214, 221, 226, 236, 247, 260, 268, 284, 298, 317, 328, 341, 349, 365, 379, 398, 418, 431, 439, 455, 469, 488, 508, 521, 529, 545, 559, 578, 598, 620, 628, 644, 658

Offset

1,1

Comments

Elements >= 214 can be found in A007618

References

D. R. Kaprekar, The Mathematics of the New Self Numbers, Privately Printed, 311 Devlali Camp, Devlali, India, 1963.

Links

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

D. R. Kaprekar, The Mathematics of the New Self Numbers [annotated and scanned]

Index entries for Colombian or self numbers and related sequences

Mathematica

NestList[#+Total[IntegerDigits[#]]&, 31, 60] (* Harvey P. Dale, Jan 30 2020 *)

Crossrefs

Cf. A004207, A016052, A007618, A006507, A016052, A249043.

Sequence in context: A179514 A295800 A338068 * A299455 A225138 A300093

Adjacent sequences: A036225 A036226 A036227 * A036229 A036230 A036231

Keyword

easy,nonn,base

Author

Miklos SZABO (mike(AT)ludens.elte.hu)

Extensions

Edited by Charles R Greathouse IV, Aug 02 2010

Status

approved