%I #4 Nov 20 2015 23:27:49
%S 2,2,6,2,10,30,2,10,30,210,2,10,30,330,2310,2,10,130,390,4290,30030,2,
%T 34,170,2210,6630,72930,510510,2,34,170,2210,6630,125970,1385670,
%U 9699690,2,34,170,2210,6630,125970,1385670,9699690,223092870,2,34,170,2210
%N Triangle of partial row products of A264662.
%C T(n,1) = A264662(n,1) and T(n,k) = A264662(n,k) * T(n,k-1), k=2..n;
%C T(n,n) = A002110(n).
%H Reinhard Zumkeller, <a href="/A264666/b264666.txt">Rows n = 1..125 of triangle, flattened</a>
%e . 1: 2
%e . 2: 2, 6
%e . 3: 2,10, 30
%e . 4: 2,10, 30, 210
%e . 5: 2,10, 30, 330, 2310
%e . 6: 2,10,130, 390, 4290, 30030
%e . 7: 2,34,170,2210, 6630, 72930, 510510
%e . 8: 2,34,170,2210, 6630,125970,1385670, 9699690
%e . 9: 2,34,170,2210, 6630,125970,1385670, 9699690,223092870
%e . 10: 2,34,170,2210,64090,192270,3653130,40184430,281291010,6469693230 .
%o (Haskell)
%o a264666 n k = a264666_tabl !! (n-1) !! (n-1)
%o a264666_row n = a264666_tabl !! (n-1)
%o a264666_tabl = map (scanl1 (*)) a264662_tabl
%Y Cf. A264662, A002110.
%K nonn,tabl
%O 1,1
%A _Reinhard Zumkeller_, Nov 20 2015
|