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A229527 Start with 1, skip (sum of digits of n) numbers, accept next number. 2
1, 3, 7, 15, 22, 27, 37, 48, 61, 69, 85, 99, 118, 129, 142, 150, 157, 171, 181, 192, 205, 213, 220, 225, 235, 246, 259, 276, 292, 306, 316, 327, 340, 348, 364, 378, 397, 417, 430, 438, 454, 468, 487, 507, 520, 528, 544, 558, 577, 597 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Robert G. Wilson v, Table of n, a(n) for n = 1..10000

Index entries for Colombian or self numbers and related sequences

FORMULA

a(n+1) = a(n) + (sum of digits of a(n)) + 1.

EXAMPLE

a(1)=1, a(2)=1+1+1=3, a(3)=3+3+1=7, a(4)=7+7+1=15, a(5)=15+1+5+1=22, a(6)=22+2+2+1=27, ...

MATHEMATICA

a[n_] := a[n] = a[n - 1] + 1 + Plus @@ IntegerDigits@a[n - 1]; a[1] = 1; Array[a, 50] (* Robert G. Wilson v, Aug 01 2018 *)

CROSSREFS

Cf. A007612, A004207, A160939.

Sequence in context: A146435 A046932 A015821 * A091711 A103007 A077790

Adjacent sequences:  A229524 A229525 A229526 * A229528 A229529 A229530

KEYWORD

nonn,base

AUTHOR

Dave Durgin, Sep 25 2013

STATUS

approved

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Last modified October 23 22:42 EDT 2019. Contains 328378 sequences. (Running on oeis4.)