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A096138 a(1) = 1, a(n) = digit reversal of n*a(n-1). 2

%I #12 Dec 31 2013 16:57:34

%S 1,2,6,42,12,27,981,8487,38367,76383,312048,6754473,94180878,

%T 2922358131,56917353834,443166776019,3232915383357,62400967429185,

%U 5154511838165811,22613367632090301,123698372027088474,8246495954814631272

%N a(1) = 1, a(n) = digit reversal of n*a(n-1).

%C a(10^n) is the digit reversal of a(10^n -1).

%C a(n) = A004086(A034874(n)). [_Reinhard Zumkeller_, Jan 02 2012]

%H Reinhard Zumkeller, <a href="/A096138/b096138.txt">Table of n, a(n) for n = 1..250</a>

%t nxt[{n_,a_}]:={n+1,FromDigits[Reverse[IntegerDigits[(1+n)*a]]]}; Transpose[ NestList[ nxt,{1,1},30]][[2]] (* _Harvey P. Dale_, Dec 31 2013 *)

%o (Haskell)

%o a096138 n = a096138_list !! (n-1)

%o a096138_list = 1 : g 2 1 where

%o g x y = z : g (x + 1) z where z = a004086 (x * y)

%o -- _Reinhard Zumkeller_, Jan 02 2012

%K base,nonn

%O 1,2

%A _Amarnath Murthy_, Jul 07 2004

%E Edited and extended by _Klaus Brockhaus_, Jul 09 2004

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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)