

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(n1)/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
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OFFSET

1,1


COMMENTS

The first term of the nth row is LCM of the next n numbers + first among them. r the nth row contains n consecutive numbers beginning with LCM of {(n(n1)/2 +1),(n(n1)/2 +2),... up to (n(n+1)/2)} + n(n1)/2 +1.


LINKS

Table of n, a(n) for n=1..29.


FORMULA

a(n, k) = A061431(n)+k+n*(n1)/2.  David Wasserman, Dec 22 2005


EXAMPLE

2; 8,9; 64,65,66; 2527,2528,2529,2530; ...


CROSSREFS

Cf. A091794, A091795.
Sequence in context: A181476 A055678 A301281 * A109351 A111134 A036898
Adjacent sequences: A091790 A091791 A091792 * A091794 A091795 A091796


KEYWORD

nonn,tabl


AUTHOR

Amarnath Murthy, Feb 18 2004


EXTENSIONS

More terms from David Wasserman, Dec 22 2005


STATUS

approved



