A181181 Product of the first n zero-free positive numbers with digital sum n.

1, 22, 756, 35464, 2112320, 152681760, 12984899200, 1270453824640, 140587147048320, 204867922610391040, 222308451584243548160, 277934723066170025856000, 385262452280397590195584000, 954777912911324324000159027200, 3057686768847576381964905048883200

Offset: 1

Author

Jonathan Vos Post, Jan 25 2011

Keywords

• nonn
• base
• easy

Comments

Product of the first n values in the n-th row of the triangular array A069800 in which n-th row consists of numbers (excluding the digit 0) with digit sum n arranged in increasing numerical order.

Examples

			a(3) = 756 = 3 * 12 * 21.
a(4) = 35464 = 4 * 13 * 22 * 31.
a(5) = 2112320 = 5 * 14 * 23 * 32 * 41.
		

Crossrefs

Cf. A007953, A069800, A181178.