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A036389 Number of (odd and even) split numbers (A036382) below 2^n. 0
0, 0, 1, 4, 12, 30, 69, 150, 317, 659, 1361, 2784, 5686, 11557, 23445, 47472, 95991, 193891, 391266, 788979 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Equivalently, number of split numbers (A036382) with "binary order" A029837(x) := ceiling(log_2(x)) <= n.

LINKS

Table of n, a(n) for n=1..20.

EXAMPLE

The 12 odd and even split numbers below 32 are as follows: 6, 10, 12, 14, 18, 20, 21, 22, 24, 26, 28, 30.

CROSSREFS

Cf. A029837(n) = ceiling(log_2(n)).

Sequence in context: A118425 A097809 A272144 * A036388 A037166 A118892

Adjacent sequences:  A036386 A036387 A036388 * A036390 A036391 A036392

KEYWORD

nonn

AUTHOR

Labos Elemer

EXTENSIONS

Definition rephrased by M. F. Hasler, Apr 24 2017

STATUS

approved

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Last modified April 23 07:51 EDT 2019. Contains 322381 sequences. (Running on oeis4.)