A064319 Triangle with a(n,1) = n and a(n,k) = a(n,k-1) * a(n-1,k-1).

1, 2, 2, 3, 6, 12, 4, 12, 72, 864, 5, 20, 240, 17280, 14929920, 6, 30, 600, 144000, 2488320000, 37150418534400000, 7, 42, 1260, 756000, 108864000000, 270888468480000000000, 10063619980174622195712000000000000000, 8, 56

Offset: 1

Author

Henry Bottomley, Sep 10 2001

Keywords

• nonn
• tabl

Examples

			Rows start
  1;
  2,  2;
  3,  6, 12;
  4, 12, 72, 864;
  ...
		

Crossrefs

Columns include A000027, A002378, A047928, A064321. Right-hand side is A064320. Cf. A053218 which uses addition rather than multiplication to produce binomial transform.

Extensions

Name corrected by Sean A. Irvine, Jun 30 2023