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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

%I

%S 2,8,9,64,65,66,2527,2528,2529,2530,60071,60072,60073,60074,60075,

%T 1627936,1627937,1627938,1627939,1627940,1627941,124324222,124324223,

%U 124324224,124324225,124324226,124324227,124324228,1694579069

%N 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.

%C 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.

%F a(n, k) = A061431(n)+k+n*(n-1)/2. - _David Wasserman_, Dec 22 2005

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

%Y Cf. A091794, A091795.

%K nonn,tabl

%O 1,1

%A _Amarnath Murthy_, Feb 18 2004

%E More terms from _David Wasserman_, Dec 22 2005

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Last modified August 9 20:09 EDT 2020. Contains 336326 sequences. (Running on oeis4.)