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 A162599 Sum of digits (bits) in base two representation of 3^(2^n). 0
 2, 2, 3, 6, 11, 26, 56, 97, 204, 415, 769, 1606, 3268, 6460, 12889, 25915, 52046, 104099, 207000, 416542, 831430, 1662247, 3324374, 6646337, 13292865, 26593542, 53182276, 106364450, 212732814, 425465107, 850887793, 1701801109 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Table of n, a(n) for n=0..31. EXAMPLE 3^(2^2) = 81 = 64 + 16 + 1, so a(2) = 3. MAPLE a := proc (n) local b2: b2 := convert(3^(2^n), base, 2): add(b2[j], j = 1 .. nops(b2)) end proc: seq(a(n), n = 0 .. 20); # Emeric Deutsch, Jul 21 2009 PROG (J, version 6.0.1) s=:(+/@|:@#:@ (3x ^ 2x ^ i.)) s 13 (PARI) a(n) = hammingweight(3^(2^n)); \\ Michel Marcus, Mar 03 2019 CROSSREFS Cf. A000120, A011764 (3^2^n). Sequence in context: A102762 A320783 A049853 * A064319 A307241 A064674 Adjacent sequences: A162596 A162597 A162598 * A162600 A162601 A162602 KEYWORD nonn,base AUTHOR Daniel R. L. Brown, Jul 07 2009 EXTENSIONS Extended by Emeric Deutsch, Jul 21 2009 More terms from Michel Marcus, Mar 03 2019 STATUS approved

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Last modified February 21 04:08 EST 2024. Contains 370219 sequences. (Running on oeis4.)