A264666 Triangle of partial row products of A264662.

2, 2, 6, 2, 10, 30, 2, 10, 30, 210, 2, 10, 30, 330, 2310, 2, 10, 130, 390, 4290, 30030, 2, 34, 170, 2210, 6630, 72930, 510510, 2, 34, 170, 2210, 6630, 125970, 1385670, 9699690, 2, 34, 170, 2210, 6630, 125970, 1385670, 9699690, 223092870, 2, 34, 170, 2210

Offset: 1

Author

Reinhard Zumkeller, Nov 20 2015

Keywords

• nonn
• tabl

Comments

T(n,1) = A264662(n,1) and T(n,k) = A264662(n,k) * T(n,k-1), k=2..n;

T(n,n) = A002110(n).

Examples

			.  1:  2
.  2:  2, 6
.  3:  2,10, 30
.  4:  2,10, 30, 210
.  5:  2,10, 30, 330, 2310
.  6:  2,10,130, 390, 4290, 30030
.  7:  2,34,170,2210, 6630, 72930, 510510
.  8:  2,34,170,2210, 6630,125970,1385670, 9699690
.  9:  2,34,170,2210, 6630,125970,1385670, 9699690,223092870
. 10:  2,34,170,2210,64090,192270,3653130,40184430,281291010,6469693230 .
		

Links

• Reinhard Zumkeller, Rows n = 1..125 of triangle, flattened

Crossrefs

Cf. A264662, A002110.

Programs

Haskell

a264666 n k = a264666_tabl !! (n-1) !! (n-1)
a264666_row n = a264666_tabl !! (n-1)
a264666_tabl = map (scanl1 (*)) a264662_tabl