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A044322 Numbers n such that the string 7,8 occurs in the base 9 representation of n but not of n-1. 0
71, 152, 233, 314, 395, 476, 557, 638, 719, 800, 881, 962, 1043, 1124, 1205, 1286, 1367, 1448, 1529, 1610, 1691, 1772, 1853, 1934, 2015, 2096, 2177, 2258, 2339, 2420, 2501, 2582, 2663, 2744, 2825, 2906, 2987, 3068, 3149 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Appears to satisfy the recurrence a(n) = a(n-1) + 81, a(0) = 71, but this fails since 5822 is not a member.
LINKS
Tanya Khovanova, Non Recursions
MATHEMATICA
SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 9], {7, 8}]>0, 1, 0], {n, 3200}], {0, 1}][[;; , 2]] (* Harvey P. Dale, Mar 04 2023 *)
CROSSREFS
Sequence in context: A033224 A142178 A046004 * A044703 A142277 A063330
KEYWORD
nonn,base
AUTHOR
STATUS
approved

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Last modified February 26 11:46 EST 2024. Contains 370352 sequences. (Running on oeis4.)