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A121826 Prod_{k=1..n} D(k), where D() are the doublets, A020338. 0
11, 242, 7986, 351384, 19326120, 1275523920, 98215341840, 8642950081920, 855652058110080, 864208578691180800, 960135730925901868800, 1163684505882193064985600, 1527917756223319494326092800 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

a(4)=351384 because 11*22*33*44 = 351384.

CROSSREFS

Sequence in context: A267642 A267665 A196258 * A041223 A041220 A219089

Adjacent sequences:  A121823 A121824 A121825 * A121827 A121828 A121829

KEYWORD

easy,nonn

AUTHOR

Jason Earls, Aug 27 2006

STATUS

approved

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Last modified September 30 05:03 EDT 2020. Contains 337435 sequences. (Running on oeis4.)