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A189788 Base 10 lunar factorials: a(n) = (lunar) Product_{i=1..n} i. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 10, 110, 1110, 11110, 111110, 1111110, 11111110, 111111110, 1111111110, 11111111110, 111111111100, 1111111111100, 11111111111100, 111111111111100, 1111111111111100, 11111111111111100, 111111111111111100, 1111111111111111100, 11111111111111111100, 111111111111111111100, 1111111111111111111000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,10

COMMENTS

0!, being an empty product, would be 9 (the multiplicative identity) by convention.

LINKS

Table of n, a(n) for n=1..30.

D. Applegate, M. LeBrun and N. J. A. Sloane, Dismal Arithmetic [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing]

Index entries for sequences related to dismal (or lunar) arithmetic

EXAMPLE

4! = 1 X 2 X 3 X 4 = 1.

CROSSREFS

Sequence in context: A144099 A102092 A284021 * A105279 A246942 A057093

Adjacent sequences:  A189785 A189786 A189787 * A189789 A189790 A189791

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, May 23 2011

STATUS

approved

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Last modified March 28 02:40 EDT 2017. Contains 284182 sequences.