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 A118028 a(0)=1. a(n) = a(n-1) + (smallest integer which is >= n and is missing from the earlier terms of the sequence). 5
 1, 3, 5, 9, 13, 19, 25, 32, 40, 50, 60, 71, 83, 97, 111, 126, 142, 159, 177, 197, 217, 238, 260, 283, 307, 333, 359, 386, 414, 443, 473, 504, 537, 570, 604, 639, 675, 712, 750, 789, 830, 871, 913, 956, 1000, 1045, 1091, 1138, 1186, 1235, 1286, 1337, 1389, 1442 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Michael De Vlieger, Table of n, a(n) for n = 0..1000 MATHEMATICA a = {1}; Do[k = 2; While[Nand[FreeQ[a, k], k >= i], k++]; AppendTo[a, a[[i]] + k], {i, 53}]; a (* Michael De Vlieger, Sep 19 2017 *) CROSSREFS Cf. A118026, A118027, A118029, A118030, A094589. Sequence in context: A207187 A065802 A245302 * A209974 A099392 A080827 Adjacent sequences:  A118025 A118026 A118027 * A118029 A118030 A118031 KEYWORD easy,nonn AUTHOR Leroy Quet, Apr 10 2006 EXTENSIONS More terms from Joshua Zucker, Jul 27 2006 STATUS approved

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Last modified December 12 20:12 EST 2019. Contains 329961 sequences. (Running on oeis4.)