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 A102528 a(n)=least positive integer not a(k) or a(k)+floor(k/2) for any k
 1, 2, 4, 6, 7, 10, 11, 12, 15, 17, 18, 20, 21, 24, 25, 28, 29, 30, 33, 34, 35, 38, 40, 41, 43, 46, 47, 48, 50, 52, 54, 56, 57, 58, 61, 63, 65, 66, 68, 70, 71, 74, 76, 77, 79, 80, 82, 84, 86, 88, 89, 92, 93, 94, 96, 98, 100, 102, 104, 106, 107, 109, 111, 112, 115, 116, 117 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE Let b(n)=n-th positive integer of the form a(k)+floor(k/2). Clearly a(1)=1, so b(1)=1, so a(2)=2, so b(2)=3, so a(3)=4 and so on. CROSSREFS Cf. A102529, A102530. Sequence in context: A321612 A259983 A050095 * A319829 A272631 A002158 Adjacent sequences:  A102525 A102526 A102527 * A102529 A102530 A102531 KEYWORD nonn AUTHOR Clark Kimberling, Jan 13 2005 STATUS approved

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Last modified April 24 09:54 EDT 2019. Contains 322420 sequences. (Running on oeis4.)