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A044401 Numbers n such that string 6,9 occurs in the base 10 representation of n but not of n-1. 0
69, 169, 269, 369, 469, 569, 669, 690, 769, 869, 969, 1069, 1169, 1269, 1369, 1469, 1569, 1669, 1690, 1769, 1869, 1969, 2069, 2169, 2269, 2369, 2469, 2569, 2669, 2690, 2769, 2869, 2969, 3069, 3169, 3269, 3369, 3469, 3569 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[4000], MemberQ[Partition[IntegerDigits[#], 2, 1], {6, 9}] && !MemberQ[Partition[IntegerDigits[#-1], 2, 1], {6, 9}]&] (* Harvey P. Dale, Jul 20 2011 *)
CROSSREFS
Sequence in context: A118215 A033672 A020198 * A044782 A020296 A259637
KEYWORD
nonn,base
AUTHOR
STATUS
approved

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Last modified March 18 22:09 EDT 2024. Contains 370951 sequences. (Running on oeis4.)