The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A257259 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A257259

a(n) = A218542(n) - A218543(n).
(history; published version)

#7 by N. J. A. Sloane at Wed May 13 15:33:58 EDT 2015

STATUS

proposed

approved

#6 by Antti Karttunen at Wed May 13 15:06:12 EDT 2015

STATUS

editing

proposed

#5 by Antti Karttunen at Wed May 13 14:55:48 EDT 2015

COMMENTS

a(n) = the difference between the number of even numbers and the number of odd numbers are encountered, when traversing from 2^(n+1)-1 to (2^n)-1 by iterating the map A011371: x -> x - (number of 1's in binary representation of x).

#4 by Antti Karttunen at Wed May 13 05:29:34 EDT 2015

COMMENTS

CROSSREFS

Cf. A011371, A218542, A218543, A213709.

#3 by Antti Karttunen at Wed May 13 04:35:02 EDT 2015

CROSSREFS

Partial sums: A257805.

#2 by Antti Karttunen at Wed May 13 04:31:46 EDT 2015

NAME

allocated for Antti Karttunen

a(n) = A218542(n) - A218543(n).

DATA

1, -1, 0, -1, -1, -3, -1, -6, -8, -10, -7, -4, 2, 2, -14, -90, -318, -896, -2166, -4691, -9298, -17175, -30007, -50261, -81664, -129637, -200973, -301205, -426500, -545183, -561511, -252122, 836543, 3542930, 9312475, 20508985, 40858087, 76119037, 135203839, 232236417, 390709345, 652711050, 1101492173, 1921013671, 3558812217, 7170401227, 15800043812, 37400877416

OFFSET

0,6

FORMULA

a(n) = A218542(n) - A218543(n).

PROG

(Scheme) (define (A257259 n) (- (A218542 n) (A218543 n)))

CROSSREFS

Cf. A218542, A218543, A213709.

KEYWORD

allocated

sign

AUTHOR

Antti Karttunen, May 13 2015

STATUS

approved

editing

#1 by Antti Karttunen at Sun Apr 19 09:58:25 EDT 2015

NAME

allocated for Antti Karttunen

KEYWORD

allocated

STATUS

approved