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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A091793 Triangle read by rows in which row n contains the smallest nontrivial set of n consecutive numbers divisible by the next n numbers respectively. The next n numbers are numbers from n(n-1)/2 +1 up to n(n+1)/2. 2
2, 8, 9, 64, 65, 66, 2527, 2528, 2529, 2530, 60071, 60072, 60073, 60074, 60075, 1627936, 1627937, 1627938, 1627939, 1627940, 1627941, 124324222, 124324223, 124324224, 124324225, 124324226, 124324227, 124324228, 1694579069 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The first term of the n-th row is LCM of the next n numbers + first among them. r the n-th row contains n consecutive numbers beginning with LCM of {(n(n-1)/2 +1),(n(n-1)/2 +2),... up to (n(n+1)/2)} + n(n-1)/2 +1.
LINKS
FORMULA
a(n, k) = A061431(n)+k+n*(n-1)/2. - David Wasserman, Dec 22 2005
EXAMPLE
2; 8,9; 64,65,66; 2527,2528,2529,2530; ...
CROSSREFS
Sequence in context: A181476 A055678 A301281 * A350454 A109351 A111134
KEYWORD
nonn,tabl
AUTHOR
Amarnath Murthy, Feb 18 2004
EXTENSIONS
More terms from David Wasserman, Dec 22 2005
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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 06:15 EDT 2024. Contains 371265 sequences. (Running on oeis4.)