The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A120435 Triangle read by rows: T(n,k) = lcm(1,2,3,4,...,n)/k (1 <= k <= n). 0
 1, 2, 1, 6, 3, 2, 12, 6, 4, 3, 60, 30, 20, 15, 12, 60, 30, 20, 15, 12, 10, 420, 210, 140, 105, 84, 70, 60, 840, 420, 280, 210, 168, 140, 120, 105, 2520, 1260, 840, 630, 504, 420, 360, 315, 280, 2520, 1260, 840, 630, 504, 420, 360, 315, 280, 252, 27720, 13860, 9240 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS T(n,1) = A003418(n). Row sums yield A025529. - Emeric Deutsch, Jul 24 2006 LINKS EXAMPLE Triangle starts: 1; 2, 1; 6, 3, 2; 12, 6, 4, 3; 60, 30, 20, 15, 12; MAPLE T:=proc(n, k) if k<=n then lcm(seq(j, j=1..n))/k else 0 fi end: for n from 1 to 11 do seq(T(n, k), k=1..n) od; # yields sequence in triangular form); # Emeric Deutsch, Jul 24 2006 CROSSREFS Cf. A003418, A094310. Cf. A003418, A025529. Sequence in context: A107867 A158442 A252095 * A125901 A094307 A097905 Adjacent sequences: A120432 A120433 A120434 * A120436 A120437 A120438 KEYWORD nonn,tabl AUTHOR Leroy Quet, Jul 15 2006 EXTENSIONS More terms from Emeric Deutsch, Jul 24 2006 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified February 2 03:35 EST 2023. Contains 359997 sequences. (Running on oeis4.)