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A030194 Let S = triangular numbers; a(0)=0; a(n) = smallest m such that m - a(i) is not in S for any i < n. 0
0, 2, 4, 9, 11, 13, 18, 20, 22, 27, 29, 31, 51, 53, 60, 62, 69, 71, 85, 94, 101, 103, 110, 112, 141, 143, 150, 152, 159, 161, 168, 170, 211, 220, 229, 245, 267, 269, 292, 299, 301, 308, 310, 317, 319, 326, 348, 357, 359 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

Related papers: A. Sárközy. On the difference sets of sequences of integers, Acta. Math. Acad. Sci. Hungar. 31(1978), no. 1-2, 125-149; no. 3-4, 355-386; Ann. Univ. Sci. Budapest. Eotvos Sect. Math. 21(1978), 45-53.

I. Z. Rusza. Difference sets without squares, Periodica Math. Hugarica 15(1984), 205-209.

LINKS

Table of n, a(n) for n=0..48.

CROSSREFS

Sequence in context: A203847 A172147 A266726 * A190494 A101255 A047348

Adjacent sequences:  A030191 A030192 A030193 * A030195 A030196 A030197

KEYWORD

nonn

AUTHOR

Jan Kristian Haugland (jankrihau(AT)hotmail.com)

STATUS

approved

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Last modified November 18 15:55 EST 2018. Contains 317323 sequences. (Running on oeis4.)