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 A347499 Triangle read by rows: n-th row is the lexicographically earliest n-element subset of {1,2,3,...,A347498(n)} with the property that all products i * j are distinct for i <= j. 2
 1, 1, 2, 1, 2, 3, 1, 2, 3, 5, 1, 3, 4, 5, 6, 1, 3, 4, 5, 6, 7, 1, 2, 5, 6, 7, 8, 9, 1, 2, 5, 6, 7, 8, 9, 11, 1, 2, 5, 6, 7, 8, 9, 11, 13, 1, 2, 5, 7, 8, 9, 11, 12, 13, 15, 1, 2, 5, 7, 8, 9, 11, 12, 13, 15, 17, 1, 2, 5, 7, 8, 9, 11, 12, 13, 15, 17, 19 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Is the first column the all 1's sequence? LINKS EXAMPLE Triangle begins: 1; 1, 2; 1, 2, 3; 1, 2, 3, 5; 1, 3, 4, 5, 6; 1, 3, 4, 5, 6, 7; 1, 2, 5, 6, 7, 8, 9; 1, 2, 5, 6, 7, 8, 9, 11; 1, 2, 5, 6, 7, 8, 9, 11, 13; 1, 2, 5, 7, 8, 9, 11, 12, 13, 15; 1, 2, 5, 7, 8, 9, 11, 12, 13, 15, 17; 1, 2, 5, 7, 8, 9, 11, 12, 13, 15, 17, 19; 1, 5, 6, 7, 9, 11, 13, 14, 15, 16, 17, 19, 20; 1, 2, 5, 7, 11, 12, 13, 16, 17, 18, 19, 20, 21, 23; ... CROSSREFS A106683 is analogous for addition. Cf. A347498. Sequence in context: A193588 A165884 A263939 * A136311 A243884 A334428 Adjacent sequences: A347496 A347497 A347498 * A347500 A347501 A347502 KEYWORD nonn,tabl AUTHOR Peter Kagey, Sep 03 2021 STATUS approved

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Last modified November 26 20:27 EST 2022. Contains 358362 sequences. (Running on oeis4.)