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A007095 Numbers in base 9.
(Formerly M0490)
23
0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30, 31, 32, 33, 34, 35, 36, 37, 38, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 51, 52, 53, 54, 55, 56, 57, 58, 60, 61, 62, 63, 64, 65, 66, 67, 68, 70, 71, 72, 73, 74 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Also numbers without 9 as a digit.

Complement of A011539: A102683(a(n)) = 0; A068505(a(n)) <> a(n)). [Reinhard Zumkeller, Dec 29 2011]

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Nathaniel Johnston, Table of n, a(n) for n = 0..10000

FORMULA

a(0)=0 a(n)=10*a(n/9) if n==0 (mod 9) a(n)=a(n-1)+1 otherwise. - Benoit Cloitre, Dec 22, 2002

MAPLE

A007095 := proc(n) local l: if(n=0)then return 0: fi: l:=convert(n, base, 9): return op(convert(l, base, 10, 10^nops(l))): end: seq(A007095(n), n=0..67); # Nathaniel Johnston, May 06 2011

MATHEMATICA

Table[ FromDigits[ IntegerDigits[n, 9]], {n, 0, 75}]

PROG

(PARI) a(n)=if(n<1, 0, if(n%9, a(n-1)+1, 10*a(n/9)))

(MAGMA) [ n: n in [0..74] | not 9 in Intseq(n) ];  // Bruno Berselli, May 28 2011

(sh) seq 0 1000 | grep -v 9; # Joerg Arndt, May 29 2011

(Haskell)

a011539 n = a011539_list !! (n-1)

a011539_list = filter ((> 0) . a102683) [1..]

-- Reinhard Zumkeller, Dec 29 2011

CROSSREFS

Cf. A000042, A004184, A004728, A007088, A007089, A007090, A007091, A007092, A007093, A007094, A037479.

Sequence in context: A183221 A036741 A037479 * A088481 A194151 A020663

Adjacent sequences:  A007092 A007093 A007094 * A007096 A007097 A007098

KEYWORD

nonn,easy,base

AUTHOR

N. J. A. Sloane, Robert G. Wilson v

STATUS

approved

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Last modified July 24 19:05 EDT 2014. Contains 244897 sequences.