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 A169896 Irregular triangle read by rows in which row n (n>=1) lists distinct carryless divisors i of in range 1 <= i <= n. 0
 1, 1, 2, 1, 3, 1, 2, 4, 1, 3, 5, 5, 5, 1, 2, 3, 4, 6, 6, 1, 7, 1, 2, 3, 4, 4, 6, 6, 7, 8, 8, 1, 3, 7, 9, 1, 10, 1, 11, 1, 12, 1, 13, 1, 14, 1, 15, 1, 16, 1, 17, 1, 18, 1, 19, 1, 2, 2, 6, 10, 15, 20, 20, 1, 21, 1, 2, 2, 6, 11, 16, 22, 22, 1, 23, 1, 2, 2, 6, 12, 17, 24, 24, 1, 25, 1, 2, 2, 6, 6, 13, 18 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS EXAMPLE Triangle begins: 1, 1, 2, 1, 3, 1, 2, 4, 1, 3, 5, 1, 2, 3, 4, 6, 1, 7, 1, 2, 3, 4, 6, 7, 8, 1, 3, 7, 9, 1, 10, 1, 11, 1, 12, 1, 13, 1, 14, 1, 15, 1, 16, 1, 17, 1, 18, 1, 19, 1, 2, 6, 10, 15, 20, 1, 21, 1, 2, 6, 11, 16, 22, ... CROSSREFS Sequence in context: A165416 A222818 A057059 * A210208 A162306 A233773 Adjacent sequences:  A169893 A169894 A169895 * A169897 A169898 A169899 KEYWORD nonn,tabf,base AUTHOR David Applegate, Marc LeBrun and N. J. A. Sloane, Jul 11 2010 STATUS approved

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Last modified August 11 00:32 EDT 2020. Contains 336403 sequences. (Running on oeis4.)