A044534 Numbers n such that string 2,1 occurs in the base 7 representation of n but not of n+1.

15, 64, 111, 113, 162, 211, 260, 309, 358, 407, 454, 456, 505, 554, 603, 652, 701, 783, 797, 799, 848, 897, 946, 995, 1044, 1093, 1140, 1142, 1191, 1240, 1289, 1338, 1387, 1436, 1483, 1485, 1534, 1583, 1632, 1681, 1730, 1779

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Mathematica

Select[Range[2000], MemberQ[Partition[IntegerDigits[#, 7], 2, 1], {2, 1}] && !MemberQ[Partition[IntegerDigits[#+1, 7], 2, 1], {2, 1}]&] (* Harvey P. Dale, Jun 24 2012 *)

Crossrefs

Sequence in context: A152099 A119496 A044153 * A063483 A320555 A347478

Adjacent sequences: A044531 A044532 A044533 * A044535 A044536 A044537

Keyword

nonn,base

Author

Clark Kimberling

Status

approved