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A068158 a(n) = floor[ n!/(R(n))! ], where R(n) = Digit reversal of n (A004086). 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 3628800, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1216451004088320000, 106661318400, 1, 0, 0, 0, 0, 0, 0, 0, 44208809968698509772718080000000, 1320509264105545113600000, 10178348544000, 1, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,10
COMMENTS
If n < R(n) then a(n) =0, n is a palindrome a(n) = 1 and for n > R(n) n!/(R(n)! = an integer.
LINKS
EXAMPLE
a(21) = 21! / 12! = 51090942171709440000/479001600 = 106661318400.
CROSSREFS
Sequence in context: A118813 A127229 A269128 * A011521 A321846 A226889
KEYWORD
base,easy,nonn
AUTHOR
Amarnath Murthy, Feb 24 2002
STATUS
approved

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Last modified March 19 09:40 EDT 2024. Contains 370981 sequences. (Running on oeis4.)