A044787 Numbers n such that string 7,4 occurs in the base 10 representation of n but not of n+1.

74, 174, 274, 374, 474, 574, 674, 749, 774, 874, 974, 1074, 1174, 1274, 1374, 1474, 1574, 1674, 1749, 1774, 1874, 1974, 2074, 2174, 2274, 2374, 2474, 2574, 2674, 2749, 2774, 2874, 2974, 3074, 3174, 3274, 3374, 3474, 3574

Offset

1,1

Links

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

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {7, 4}]>0, 1, 0], {n, 4000}], {1, 0}][[All, 1]] (* Harvey P. Dale, Dec 09 2022 *)

Crossrefs

Sequence in context: A105053 A260171 A044406 * A204370 A204363 A051970

Adjacent sequences: A044784 A044785 A044786 * A044788 A044789 A044790

Keyword

nonn,base

Author

Clark Kimberling

Status

approved