A044247 - OEIS

A044247

Numbers n such that string 7,4 occurs in the base 8 representation of n but not of n-1.

60, 124, 188, 252, 316, 380, 444, 480, 508, 572, 636, 700, 764, 828, 892, 956, 992, 1020, 1084, 1148, 1212, 1276, 1340, 1404, 1468, 1504, 1532, 1596, 1660, 1724, 1788, 1852, 1916, 1980, 2016, 2044, 2108, 2172, 2236, 2300, 2364, 2428, 2492, 2528, 2556

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OFFSET

1,1

LINKS

Matthew House, Table of n, a(n) for n = 1..10000

MATHEMATICA

Flatten[Position[Partition[Table[If[MemberQ[Partition[IntegerDigits[n, 8], 2, 1], {7, 4}], 1, 0], {n, 4000}], 2, 1], {0, 1}]] + 1 (* Vincenzo Librandi, Aug 18 2015 *)

CROSSREFS

Sequence in context: A049058 A056501 A056491 * A044628 A181190 A246474

Adjacent sequences: A044244 A044245 A044246 * A044248 A044249 A044250

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved