



1, 1, 3, 3, 3, 3, 3, 3, 5, 7, 7, 7, 7, 7, 7, 5, 5, 5, 7, 7, 11, 13, 7, 7, 7, 7, 13, 11, 7, 7, 5, 5, 7, 7, 13, 13, 15, 15, 15, 11, 11, 11, 13, 13, 13, 15, 15, 11, 11, 15, 15, 13, 13, 13, 11, 11, 11, 15, 15, 15, 13, 13, 7, 7, 7, 7, 15, 15, 15, 15, 13, 13, 15, 15, 27, 23, 23, 27, 15, 15, 15, 15, 27, 27, 29, 29, 31, 23, 21, 29, 31, 23, 23, 25, 11, 11, 11, 11, 25
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OFFSET

1,3


LINKS

Antti Karttunen, Table of n, a(n) for n = 1..8192
Index entries for sequences related to binary expansion of n


FORMULA

a(n) = A002487(n1) OR A002487(n), where OR is bitwiseor (A003986).
a(n) = A283987(n) + A283988(n).
a(n) = A007306(n)  A283988(n).
a(n) = A283976((2*n)1).


MATHEMATICA

a[0] = 0; a[1] = 1; a[n_] := If[EvenQ@ n, a[n/2], a[(n  1)/2] + a[(n + 1)/2]]; Table[BitOr[a[n  1], a@ n], {n, 120}] (* Michael De Vlieger, Mar 22 2017 *)


PROG

(Scheme) (define (A283986 n) (A003986bi (A002487 ( n 1)) (A002487 n))) ;; Where A003986bi implements bitwiseOR (A003986).
(PARI) A(n) = if(n<2, n, if(n%2, A(n\2) + A((n + 1)/2), A(n/2)));
for(n=1, 101, print1(bitor(A(n  1), A(n))", ")) \\ Indranil Ghosh, Mar 23 2017


CROSSREFS

Odd bisection of A283976.
Cf. A002487, A003986, A283988.
Cf. A283973 (positions where coincides with A007306, equally, with A283987).
Sequence in context: A178832 A111233 A210746 * A105159 A209291 A176873
Adjacent sequences: A283983 A283984 A283985 * A283987 A283988 A283989


KEYWORD

nonn,base


AUTHOR

Antti Karttunen, Mar 21 2017


STATUS

approved



