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 A340997 a(n) is the first k such that A340996(k) = n. 2

%I #8 Feb 02 2021 11:37:55

%S 1,5,8,16,26,24,36,48,54,60,84,96,90,132,144,120,174,150,168,180,246,

%T 234,240,210,270,342,300,324,396,378,330,468,390,450,618,462,420,654,

%U 594,540,510,546,786,702,726,768,630,690,660,1078,858,936,798,780,930,1008,900,1164,1056,966,840,1278

%N a(n) is the first k such that A340996(k) = n.

%H Robert Israel, <a href="/A340997/b340997.txt">Table of n, a(n) for n = 0..1000</a>

%F A340996(a(n)) = n.

%e a(3) = 16 as A340996(16) = 3 and this is the first occurrence of 3 in A340996.

%p f:= proc(n) local k; nops(select(isprime,{seq(n mod k, k=select(isprime,[\$2..n-1]))})) end proc:

%p V:= Array(0..100):

%p count:= 0:

%p for n from 1 while count < 101 do

%p v:= f(n);

%p if v <= 100 and V[v] = 0 then V[v]:= n; count:= count+1;

%p od:

%p convert(V,list);

%Y Cf. A340996.

%K nonn

%O 0,2

%A _J. M. Bergot_ and _Robert Israel_, Feb 01 2021

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Last modified April 15 05:10 EDT 2024. Contains 371667 sequences. (Running on oeis4.)