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A173528 a(n) = 1 + sum of digits of n-1 written in base 8. 7
1, 2, 3, 4, 5, 6, 7, 8, 2, 3, 4, 5, 6, 7, 8, 9, 3, 4, 5, 6, 7, 8, 9, 10, 4, 5, 6, 7, 8, 9, 10, 11, 5, 6, 7, 8, 9, 10, 11, 12, 6, 7, 8, 9, 10, 11, 12, 13, 7, 8, 9, 10, 11, 12, 13, 14, 8, 9, 10, 11, 12, 13, 14, 15, 2, 3, 4, 5, 6, 7, 8, 9, 3, 4, 5, 6, 7, 8, 9, 10, 4, 5, 6, 7, 8, 9, 10, 11 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
If A053829 is written as a triangle then the rows converge to this sequence; see the conjecture in A000120.
The sequence is the base b=8 case in a family of 8 sequences for base b=2 (A063787) and bases 3 to 9 (A173523 to A173529). Common aspects (recurrences etc.) of these are documented in A173525.
LINKS
FORMULA
a(n) = A053829(n-1)+1.
PROG
(Magma) a053829:=func< n | &+Intseq(n, 8) >; a173528:=func< n | a053829(n-1)+1 >; [ a173528(n): n in [1..90] ]; // Klaus Brockhaus, Dec 07 2010
(Sage) A173528 = lambda n: 1+sum((n-1).digits(base=8)) # D. S. McNeil, Dec 07 2010
CROSSREFS
Sequence in context: A347689 A151950 A104418 * A245345 A043268 A346973
KEYWORD
nonn,base
AUTHOR
Omar E. Pol, Feb 20 2010
EXTENSIONS
More terms from Vincenzo Librandi, Feb 21 2010
Definition and formula added by M. F. Hasler, Dec 06 2010
STATUS
approved

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Last modified March 19 04:26 EDT 2024. Contains 370952 sequences. (Running on oeis4.)