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A285103 Number of odd terms on row n of A053632: a(n) = A000120(A068052(n)). 6
1, 2, 4, 6, 6, 12, 12, 16, 22, 28, 32, 30, 36, 52, 48, 62, 62, 68, 88, 104, 116, 108, 128, 128, 132, 168, 160, 168, 200, 204, 240, 232, 242, 284, 300, 324, 332, 348, 352, 352, 412, 440, 400, 466, 460, 516, 496, 566, 582, 580, 608, 646, 676, 736, 716, 782, 728, 816, 832, 856, 916, 924, 948, 1034, 1008, 1044, 1096, 1154, 1112, 1212, 1204, 1188 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..256

FORMULA

a(n) = A000120(A068052(n)).

a(n) = A001221(A285102(n)) = A001222(A285102(n)).

A285104(n) = 2^n - a(n).

A000124(n) = a(n) + A285105(n).

PROG

(Scheme) (define (A285103 n) (A000120 (A068052 n)))

(Python)

l=[1]

def a000120(n): return bin(n)[2:].count('1')

for n in xrange(1, 101):

    x=l[n - 1]

    l+=[x^(2**n*x), ]

print map(a000120, l) # Indranil Ghosh, Jun 28 2017

CROSSREFS

Number of odd term on row n of A053632.

Cf. A000120, A000124, A001221, A001222, A068052, A285102, A285104, A285105.

Sequence in context: A222733 A141677 A087459 * A123258 A278227 A104968

Adjacent sequences:  A285100 A285101 A285102 * A285104 A285105 A285106

KEYWORD

nonn

AUTHOR

Antti Karttunen, Apr 15 2017

STATUS

approved

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Last modified July 16 23:49 EDT 2019. Contains 325092 sequences. (Running on oeis4.)