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 A115420 Numbers having a 1 in position 4 of their binary expansion. 6
 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS One of the mystery calculator sequences: A005408, A042964, A047566, A115419, A115420, A115421. LINKS Maths Magic, Mystery Calculator. EXAMPLE a(1) = 16 = 10000 in binary. MAPLE a:= n-> n+15 + 16*iquo(n-1, 16): seq(a(n), n=1..100);  # Alois P. Heinz, Aug 22 2011 CROSSREFS Cf. A005408, A042964, A047566, A115419, A115421. Sequence in context: A190582 A004457 A248501 * A250038 A296754 A297284 Adjacent sequences:  A115417 A115418 A115419 * A115421 A115422 A115423 KEYWORD base,easy,nonn AUTHOR Jeremy Gardiner, Jan 22 2006 STATUS approved

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Last modified June 7 05:20 EDT 2020. Contains 334837 sequences. (Running on oeis4.)