A044544 Numbers n such that string 3,4 occurs in the base 7 representation of n but not of n+1.

25, 74, 123, 172, 181, 221, 270, 319, 368, 417, 466, 515, 524, 564, 613, 662, 711, 760, 809, 858, 867, 907, 956, 1005, 1054, 1103, 1152, 1201, 1210, 1273, 1299, 1348, 1397, 1446, 1495, 1544, 1553, 1593, 1642, 1691, 1740, 1789

Offset

1,1

Links

Table of n, a(n) for n=1..42.

Mathematica

s34Q[n_]:=Module[{idn7=Partition[IntegerDigits[n, 7], 2, 1]}, MemberQ[ idn7, {3, 4}]]; Select[Range[2000], s34Q[#]&&!s34Q[#+1]&] (* Harvey P. Dale, Feb 01 2013 *)

Crossrefs

Sequence in context: A098439 A318643 A044163 * A045180 A270385 A053742

Adjacent sequences: A044541 A044542 A044543 * A044545 A044546 A044547

Keyword

nonn,base

Author

Clark Kimberling

Status

approved