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A001633 Numbers with an odd number of digits. 13
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

A055642(a(n)) mod 2 = 1. - Reinhard Zumkeller, Jul 14 2014

LINKS

T. D. Noe, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Range[0, 145], OddQ[Length[IntegerDigits[#]]] &] (* T. D. Noe, Aug 09 2012 *)

PROG

(Haskell)

a001633 n = a001633_list !! (n-1)

a001633_list = filter (odd . a055642) [0..]

-- Reinhard Zumkeller, Jul 14 2014

(PARI) is(n)=#Str(n)%2 \\ Charles R Greathouse IV, Nov 26 2018

CROSSREFS

Cf. A001637 (complement).

Cf. A055642.

Sequence in context: A271569 A239138 A298425 * A171120 A092907 A051022

Adjacent sequences:  A001630 A001631 A001632 * A001634 A001635 A001636

KEYWORD

nonn,base,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified March 26 12:43 EDT 2019. Contains 321497 sequences. (Running on oeis4.)