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A173529 a(n) = 1 + A053830(n-1), where A053830 is the sum of the digits of its argument in base 9. 7
1, 2, 3, 4, 5, 6, 7, 8, 9, 2, 3, 4, 5, 6, 7, 8, 9, 10, 3, 4, 5, 6, 7, 8, 9, 10, 11, 4, 5, 6, 7, 8, 9, 10, 11, 12, 5, 6, 7, 8, 9, 10, 11, 12, 13, 6, 7, 8, 9, 10, 11, 12, 13, 14, 7, 8, 9, 10, 11, 12, 13, 14, 15, 8, 9, 10, 11, 12, 13, 14, 15, 16, 9, 10, 11, 12, 13, 14, 15, 16, 17, 2, 3, 4, 5, 6, 7, 8, 9, 10, 3, 4, 5, 6, 7, 8, 9, 10, 11, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

If A053830 is regarded as a triangle then the rows converge to this sequence.

This is the case b=9 of a non-periodic sequence, with key formulas and definitions provided with b=5 in A173525. Case b=2 is in A063787, and cases b=3 to 8 are in A173523 to A173528.

LINKS

Table of n, a(n) for n=1..100.

FORMULA

a(n) = A053830(9^k + n - 1) where k >= ceiling(log_9(n/8)). - R. J. Mathar, Dec 09 2010

MATHEMATICA

Table[1 + Plus@@IntegerDigits[n - 1, 9], {n, 90}] (* Vincenzo Librandi, Jul 01 2019 *)

CROSSREFS

Cf. A000120, A053830, A063787, A173523, A173524, A173525, A173526, A173527, A173528.

Sequence in context: A227876 A276716 A189506 * A273005 A093017 A156230

Adjacent sequences:  A173526 A173527 A173528 * A173530 A173531 A173532

KEYWORD

nonn,base

AUTHOR

Omar E. Pol, Feb 23 2010

STATUS

approved

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Last modified September 21 07:08 EDT 2019. Contains 327253 sequences. (Running on oeis4.)