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A043997 Numbers k such that 0 and 2 occur juxtaposed in the base-10 representation of k but not of k+1. 0
20, 102, 120, 209, 220, 302, 320, 402, 420, 502, 520, 602, 620, 702, 720, 802, 820, 902, 920, 1002, 1029, 1102, 1120, 1209, 1220, 1302, 1320, 1402, 1420, 1502, 1520, 1602, 1620, 1702, 1720, 1802, 1820, 1902, 1920, 2099, 2102 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..41.

MATHEMATICA

Select[Range[2200], MemberQ[Sort/@Partition[IntegerDigits[#], 2, 1], {0, 2}] && !MemberQ[Sort/@Partition[IntegerDigits[#+1], 2, 1], {0, 2}]&] (* Harvey P. Dale, Sep 15 2011 *)

CROSSREFS

Sequence in context: A041774 A043217 A039394 * A297585 A113599 A077757

Adjacent sequences: A043994 A043995 A043996 * A043998 A043999 A044000

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified December 6 01:03 EST 2022. Contains 358594 sequences. (Running on oeis4.)