A232490 Numbers n such that 10^n is of the form m + sum of digits of m.

1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 58, 59, 60, 61, 62, 63, 64, 65, 66, 68, 69, 70, 71, 72, 73, 74, 75, 76, 78, 79, 80, 81, 82, 83, 84, 85, 86, 88, 89, 90, 91, 92, 93

Offset

1,2

References

M. Gardner, Time Travel and Other Mathematical Bewilderments. Freeman, NY, 1988, pp. 115-117 and 122.

D. R. Kaprekar, Puzzles of the Self-Numbers. 311 Devlali Camp, Devlali, India, 1959.

D. R. Kaprekar, The Mathematics of the New Self Numbers (Part V). 311 Devlali Camp, Devlali, India, 1967.

Links

Donovan Johnson, Table of n, a(n) for n = 1..10000

T. Trotter, Charlene Numbers [Warning: As of March 2018 this site appears to have been hacked. Proceed with great caution. The original content should be retrieved from the Wayback machine and added here. - N. J. A. Sloane, Mar 29 2018]

Index entries for Colombian or self numbers and related sequences

Crossrefs

Cf. A062028, A232489, A232491.

Sequence in context: A103679 A029916 A175407 * A052414 A095410 A022293

Adjacent sequences: A232487 A232488 A232489 * A232491 A232492 A232493

Keyword

nonn,base

Author

N. J. A. Sloane, Dec 01 2013

Extensions

Terms a(16) onward from Max Alekseyev, Dec 02 2013

Status

approved