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 A175569 a(0)=2; for n>=0, a(n+1) = a(n) + x where x is the smallest positive number which is not equal to a(i) +/- a(k) for any i, k, 0<=k<=i<=n. 0
 2, 3, 10, 19, 30, 44, 59, 77, 100, 124, 150, 181, 216, 252, 289, 328, 371, 416, 464, 515, 567, 620, 675, 739, 807, 879, 962, 1046, 1131, 1217, 1312, 1413, 1522, 1633, 1746, 1861, 1978, 2101, 2226, 2355, 2488, 2623, 2761, 2902, 3044, 3189, 3335, 3484, 3642 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS The same as A047699 except for a(0)=2. LINKS MATHEMATICA a=2; s={a}; X=Complement[Range[10^4], {0, a, 2a}]; Do[b=a+X[[1]]; X=Complement[X, s+b, b-s, {b, 2b}]; AppendTo[s, b]; a=b, {100}]; s CROSSREFS Cf. A047699. Sequence in context: A156909 A215121 A329850 * A275020 A122822 A295951 Adjacent sequences:  A175566 A175567 A175568 * A175570 A175571 A175572 KEYWORD nonn,changed AUTHOR Zak Seidov, Jul 14 2010 EXTENSIONS Offset corrected. - R. J. Mathar, Jun 19 2021 STATUS approved

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Last modified June 24 19:42 EDT 2021. Contains 345425 sequences. (Running on oeis4.)