login
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
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.
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