A279209 - OEIS

A279209

Length of first run of 0's in binary expansion of n.

1, 0, 1, 0, 2, 1, 1, 0, 3, 2, 1, 1, 2, 1, 1, 0, 4, 3, 2, 2, 1, 1, 1, 1, 3, 2, 1, 1, 2, 1, 1, 0, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 4, 3, 2, 2, 1, 1, 1, 1, 3, 2, 1, 1, 2, 1, 1, 0, 6, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1

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OFFSET

0,5

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..10000

EXAMPLE

4 = 100_2 so a(4) = 2.

MATHEMATICA

Table[First[Map[Length, DeleteCases[Split@IntegerDigits[n, 2], w_/; Times@@w>0]]/.{}->{0}], {n, 0, 200}] (* Vincenzo Librandi, Dec 23 2016 *) (* after Michael De Vlieger *)

CROSSREFS

Cf. A090996, A279210.

Sequence in context: A097230 A144789 A285097 * A087117 A029340 A288166

Adjacent sequences: A279206 A279207 A279208 * A279210 A279211 A279212

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Dec 22 2016

STATUS

approved