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 A135570 a(n) = 1 + Sum_{i=1..n} S2(i)*2^i, where S2(n) is digit sum of n, n in binary notation. 1
 1, 3, 7, 23, 39, 103, 231, 615, 871, 1895, 3943, 10087, 18279, 42855, 92007, 223079, 288615, 550759, 1075047, 2647911, 4745063, 11036519, 23619431, 57173863, 90728295, 191391591, 392718183, 929589095, 1734895463, 3882379111 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS G. C. Greubel, Table of n, a(n) for n = 0..1000 MATHEMATICA Table[1 + Sum[DigitCount[i, 2, 1]*2^i, {i, 1, n}], {n, 0, 25}] (* G. C. Greubel, Oct 19 2016 *) CROSSREFS Cf. A000120, A010060. Sequence in context: A270384 A213897 A291776 * A053027 A133432 A133433 Adjacent sequences:  A135567 A135568 A135569 * A135571 A135572 A135573 KEYWORD easy,nonn,base AUTHOR Ctibor O. Zizka, Feb 23 2008, corrected Mar 03 2008 EXTENSIONS Offset corrected by Alois P. Heinz, Oct 24 2019 STATUS approved

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Last modified December 7 17:41 EST 2019. Contains 329847 sequences. (Running on oeis4.)