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A068158 a(n) = floor[ n!/(R(n))! ], where R(n) = Digit reversal of n (A004086). 0

%I

%S 1,1,1,1,1,1,1,1,1,3628800,1,0,0,0,0,0,0,0,0,1216451004088320000,

%T 106661318400,1,0,0,0,0,0,0,0,44208809968698509772718080000000,

%U 1320509264105545113600000,10178348544000,1,0,0,0,0,0,0

%N a(n) = floor[ n!/(R(n))! ], where R(n) = Digit reversal of n (A004086).

%C 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.

%e a(21) = 21! / 12! = 51090942171709440000/479001600 = 106661318400.

%K base,easy,nonn

%O 1,10

%A _Amarnath Murthy_, Feb 24 2002

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Last modified September 21 01:46 EDT 2021. Contains 347596 sequences. (Running on oeis4.)