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
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
Programs
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Mathematica
NestList[#+Total[IntegerDigits[#]]&,31,60] (* Harvey P. Dale, Jan 30 2020 *)
Extensions
Edited by Charles R Greathouse IV, Aug 02 2010
Comments