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A131387 Product of the non-zero digital products of n for all the bases 1 to n (a 'total digital-product factorial'). 5
1, 1, 1, 1, 2, 4, 12, 48, 48, 192, 2880, 2880, 25920, 552960, 3265920, 1935360, 116121600, 278691840, 9405849600, 26754416640, 94058496000, 3210529996800, 869100503040000, 423789959577600, 927040536576000, 135612787064832000 (list; graph; refs; listen; history; internal format)
OFFSET

0,5

FORMULA

a(n)=product{1<=p<=n, dp_p(n)} where dp_p(n) = product of the non-zero digits of n in base p.

Cf. A131385, A010786, A007954.

CROSSREFS

Sequence in context: A131529 A165901 A074449 * A152453 A172452 A004527

Adjacent sequences:  A131384 A131385 A131386 * A131388 A131389 A131390

KEYWORD

nonn,base

AUTHOR

Hieronymus Fischer (Hieronymus.Fischer(AT)gmx.de), Jul 08 2007

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Last modified February 17 23:08 EST 2012. Contains 206085 sequences.