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A164898 First differences of numbers having only odd digits in their decimal representation. 2
2, 2, 2, 2, 2, 2, 2, 2, 2, 12, 2, 2, 2, 2, 12, 2, 2, 2, 2, 12, 2, 2, 2, 2, 12, 2, 2, 2, 2, 12, 2, 2, 2, 2, 12, 2, 2, 2, 2, 12, 2, 2, 2, 2, 12, 2, 2, 2, 2, 12, 2, 2, 2, 2, 112, 2, 2, 2, 2, 12, 2, 2, 2, 2, 12, 2, 2, 2, 2, 12, 2, 2, 2, 2, 12, 2, 2, 2, 2, 112, 2, 2, 2, 2, 12, 2, 2, 2, 2, 12, 2, 2, 2, 2, 12 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) = A014261(n+1) - A014261(n);

all terms are of the form (10^k + 8)/9, see A047855;

a(n) > 2 iff A014261(n) mod 10 = 9.

LINKS

Table of n, a(n) for n=1..95.

MATHEMATICA

Differences[Select[Range[1000], Count[IntegerDigits[#], _?EvenQ]==0&]] (* Harvey P. Dale, Jan 03 2019 *)

CROSSREFS

Sequence in context: A252375 A339170 A257773 * A100801 A194310 A306227

Adjacent sequences:  A164895 A164896 A164897 * A164899 A164900 A164901

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Aug 30 2009

STATUS

approved

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Last modified April 22 22:19 EDT 2021. Contains 343197 sequences. (Running on oeis4.)