The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A123316 Triangle read by rows: T(n,k)=(k+1)*n!/2 (1<=k<=n). 0
 1, 2, 3, 6, 9, 12, 24, 36, 48, 60, 120, 180, 240, 300, 360, 720, 1080, 1440, 1800, 2160, 2520, 5040, 7560, 10080, 12600, 15120, 17640, 20160, 40320, 60480, 80640, 100800, 120960, 141120, 161280, 181440, 362880, 544320, 725760, 907200, 1088640 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE Triangle begins: {1}, {2, 3}, {6, 9, 12}, {24, 36, 48, 60}, {120, 180, 240, 300, 360}, {720, 1080, 1440, 1800, 2160, 2520}, {5040, 7560, 10080, 12600, 15120, 17640, 20160} MAPLE T:=(n, k)->(k+1)*n!/2: for n from 1 to 10 do seq(T(n, k), k=1..n) od; # yields sequence in triangular form MATHEMATICA t[n_, m_] := (m + 1)*n!/2; a = Table[Table[t[n, m], {m, 1, n}], {n, 1, 10}]; Flatten[a] CROSSREFS Cf. A051683. Sequence in context: A261539 A325552 A271882 * A303365 A096845 A285084 Adjacent sequences:  A123313 A123314 A123315 * A123317 A123318 A123319 KEYWORD nonn,tabl AUTHOR Roger L. Bagula, Nov 09 2006 EXTENSIONS Edited by N. J. A. Sloane, Dec 03 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 25 03:49 EST 2020. Contains 331241 sequences. (Running on oeis4.)