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A110390 a(n) = F(n) mod s(n) where s(n) is the sum of the digits of the n-th Fibonacci number F(n). 1

%I #15 Jan 05 2022 18:52:40

%S 1,0,6,5,4,0,1,3,1,3,13,0,9,21,6,14,13,9,13,2,1,18,18,9,1,9,2,3,30,0,

%T 12,21,38,3,27,38,2,3,2,13,3,18,34,1,5,3,28,0,1,21,14,38,1,18,40,1,2,

%U 30,65,21,34,48,64,55,45,0,49,33,60,63,3,24,5,21,2

%N a(n) = F(n) mod s(n) where s(n) is the sum of the digits of the n-th Fibonacci number F(n).

%H Alois P. Heinz, <a href="/A110390/b110390.txt">Table of n, a(n) for n = 7..10000</a>

%F a(n) = A000045(n) mod A007953(A000045(n)) = A000045(n) mod A004090(n).

%e a(9) = 34 mod 7 = 6.

%p a:= n-> (f-> irem(f, add(i, i=convert(f, base, 10))))(combinat[fibonacci](n)):

%p seq(a(n), n=7..100); # _Alois P. Heinz_, Jan 05 2022

%t Do[k = Fibonacci[n]; Print[Mod[k, Plus @@ IntegerDigits[k]]], {n, 7, 56}] (* _Ryan Propper_, Aug 14 2005 *)

%t Mod[#,Total[IntegerDigits[#]]]&/@Fibonacci[Range[7,70]] (* _Harvey P. Dale_, Dec 05 2015 *)

%Y Cf. A000045, A004090, A007953.

%K base,easy,nonn

%O 7,3

%A _Amarnath Murthy_, Jul 27 2005

%E More terms from _Ryan Propper_, Aug 14 2005

%E More terms from _Harvey P. Dale_, Dec 05 2015

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Last modified May 9 03:13 EDT 2024. Contains 372341 sequences. (Running on oeis4.)