A044615 Numbers n such that string 5,7 occurs in the base 8 representation of n but not of n+1.

47, 111, 175, 239, 303, 367, 383, 431, 495, 559, 623, 687, 751, 815, 879, 895, 943, 1007, 1071, 1135, 1199, 1263, 1327, 1391, 1407, 1455, 1519, 1583, 1647, 1711, 1775, 1839, 1903, 1919, 1967, 2031, 2095, 2159, 2223, 2287, 2351

Offset

1,1

Links

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

Mathematica

Select[Range[2500], MemberQ[Partition[IntegerDigits[#, 8], 2, 1], {5, 7}] && !MemberQ[Partition[IntegerDigits[#+1, 8], 2, 1], {5, 7}]&] (* Harvey P. Dale, Jun 06 2011 *)

Crossrefs

Sequence in context: A201147 A142020 A044234 * A142057 A246932 A255149

Adjacent sequences: A044612 A044613 A044614 * A044616 A044617 A044618

Keyword

nonn,base

Author

Clark Kimberling

Status

approved