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A106837 Numbers n such that both n and n+1 have odd part of form 4k+3. 5
6, 11, 14, 22, 23, 27, 30, 38, 43, 46, 47, 54, 55, 59, 62, 70, 75, 78, 86, 87, 91, 94, 95, 102, 107, 110, 111, 118, 119, 123, 126, 134, 139, 142, 150, 151, 155, 158, 166, 171, 174, 175, 182, 183, 187, 190, 191, 198, 203, 206, 214, 215, 219, 222, 223, 230 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

EXAMPLE

30/2=15 is 3 mod 4 and so is 31, therefore 30 is in sequence.

MATHEMATICA

SequencePosition[Table[If[EvenQ[n], Mod[n/2^IntegerExponent[n, 2], 4], Mod[ n, 4]], {n, 250}], {3, 3}][[All, 1]] (* Requires Mathematica version 10 or later *)  (* Harvey P. Dale, Nov 20 2016 *)

CROSSREFS

Cf. A091067, A106838, A106840.

Contains A106838 and A106838+1.

Sequence in context: A315385 A315386 A315387 * A315388 A315389 A315390

Adjacent sequences:  A106834 A106835 A106836 * A106838 A106839 A106840

KEYWORD

nonn

AUTHOR

Ralf Stephan, May 03 2005

STATUS

approved

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Last modified May 25 11:17 EDT 2019. Contains 323539 sequences. (Running on oeis4.)