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Product of the first n zero-free positive numbers with digital sum n.
0

%I #7 Mar 30 2012 18:40:58

%S 1,22,756,35464,2112320,152681760,12984899200,1270453824640,

%T 140587147048320,204867922610391040,222308451584243548160,

%U 277934723066170025856000,385262452280397590195584000,954777912911324324000159027200,3057686768847576381964905048883200

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

%C 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.

%e a(3) = 756 = 3 * 12 * 21.

%e a(4) = 35464 = 4 * 13 * 22 * 31.

%e a(5) = 2112320 = 5 * 14 * 23 * 32 * 41.

%Y Cf. A007953, A069800, A181178.

%K nonn,base,easy

%O 1,2

%A _Jonathan Vos Post_, Jan 25 2011