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A087117(a(n)) = A038374(a(n)), see also A000975.
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
Index entries for sequences related to binary expansion of n
180 -> '10110100' with A087117(180)=2 and A038374(180)=2, therefore 180 is a term.
a090050 n = a090050_list !! (n+1)
a090050_list = [x | x <- [1..], a087117 x == a038374 x]
-- Reinhard Zumkeller, May 01 2012
Cf. A031443 (binary digitally balanced).
Sequence in context: A245480 A080792 A182656 * A192539 A046462 A188025
Adjacent sequences: A090047 A090048 A090049 * A090051 A090052 A090053
Reinhard Zumkeller, Nov 20 2003
Definition corrected, thanks to Leroy Quet. - Sep 17 2008