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 A236309 Total number of distinct least common multiples of (i,j) with 1<=i
 0, 1, 3, 5, 9, 10, 16, 20, 26, 28, 38, 41, 53, 56, 61, 69, 85, 88, 106, 112, 119, 124, 146, 151, 171, 177, 195, 203, 231, 235, 265, 281, 293, 301, 319, 328, 364, 373, 387, 399, 439, 445, 487, 500, 517, 528, 574, 585, 627, 637, 656, 671, 723, 732, 757, 777, 798 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Alois P. Heinz, Table of n, a(n) for n = 1..1000 EXAMPLE For n=10, 1<=i nops(s(n)): seq(a(n), n=1..80);  # Alois P. Heinz, Apr 29 2014 MATHEMATICA a[n_] := Table[LCM[i, j], {i, 1, n-1}, {j, i+1, n}] // Flatten // Union // Length; Array[a, 100] (* Jean-François Alcover, Nov 07 2020 *) CROSSREFS Cf. A202479. Sequence in context: A316296 A344293 A063038 * A304588 A335058 A066769 Adjacent sequences:  A236306 A236307 A236308 * A236310 A236311 A236312 KEYWORD nonn AUTHOR Han Hu, Apr 22 2014 EXTENSIONS More terms from Alois P. Heinz, Apr 29 2014 STATUS approved

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Last modified August 7 23:50 EDT 2022. Contains 355995 sequences. (Running on oeis4.)