A044082 Numbers n such that string 1,0 occurs in the base 5 representation of n but not of n-1.

5, 25, 55, 80, 105, 125, 180, 205, 230, 255, 275, 305, 330, 355, 380, 400, 430, 455, 480, 505, 525, 555, 580, 605, 625, 805, 830, 855, 880, 900, 930, 955, 980, 1005, 1025, 1055, 1080, 1105, 1130, 1150, 1180, 1205, 1230, 1255, 1275

Offset

1,1

Links

Table of n, a(n) for n=1..45.

Mathematica

Select[Range[1300], MemberQ[Partition[IntegerDigits[#, 5], 2, 1], {1, 0}] && !MemberQ[Partition[IntegerDigits[#-1, 5], 2, 1], {1, 0}]&] (* Harvey P. Dale, May 11 2011 *)

Crossrefs

Sequence in context: A225494 A139479 A078569 * A161143 A045576 A146649

Adjacent sequences: A044079 A044080 A044081 * A044083 A044084 A044085

Keyword

nonn,base

Author

Clark Kimberling

Status

approved