A044350 Numbers n such that string 1,8 occurs in the base 10 representation of n but not of n-1.

18, 118, 180, 218, 318, 418, 518, 618, 718, 818, 918, 1018, 1118, 1180, 1218, 1318, 1418, 1518, 1618, 1718, 1800, 1918, 2018, 2118, 2180, 2218, 2318, 2418, 2518, 2618, 2718, 2818, 2918, 3018, 3118, 3180, 3218, 3318, 3418

Offset

1,1

Links

Table of n, a(n) for n=1..39.

Mathematica

Select[Range[3500], MemberQ[Partition[IntegerDigits[#], 2, 1], {1, 8}] && !MemberQ[Partition[IntegerDigits[#-1], 2, 1], {1, 8}]&]  (* Harvey P. Dale, Apr 11 2011 *)

Crossrefs

Sequence in context: A101089 A022678 A293878 * A044731 A190705 A108648

Adjacent sequences: A044347 A044348 A044349 * A044351 A044352 A044353

Keyword

nonn,base

Author

Clark Kimberling

Status

approved