cp's OEIS Frontend

A100948 Irregular triangle with T(n,1) = floor(n!/3), T(n,2) = n!/2, T(n,3) = n!, read by rows.

%I A100948 #7 May 12 2013 03:11:41
%S A100948 1,1,2,2,3,6,8,12,24,40,60,120,240,360,720,1680,2520,5040,13440,20160,
%T A100948 40320,120960,181440,362880,1209600,1814400,3628800
%N A100948 Irregular triangle with T(n,1) = floor(n!/3), T(n,2) = n!/2, T(n,3) = n!, read by rows.
%F A100948 T(n,1) = A002301(n), n>=3. T(n,2) = A001710(n). T(n,3) = A000142(n).
%e A100948 1, 1, 2;
%e A100948 2, 3, 6;
%e A100948 8, 12, 24;
%e A100948 40, 60, 120;
%e A100948 240, 360, 720;
%e A100948 1680, 2520, 5040;
%e A100948 13440, 20160, 40320;
%e A100948 120960, 181440, 362880;
%e A100948 1209600, 1814400, 3628800;
%t A100948 Flatten[Table[{If[n < 3, 1, n!/3], If[n < 2, 1, n!/2], n!}, {n, 1, 10}]]
%K A100948 nonn,tabf,easy
%O A100948 2,3
%A A100948 _Roger L. Bagula_, Jun 07 2007