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%I #9 May 03 2015 13:48:18
%S 2,6,9,12,8,14,30,17,20,28,123,23,201,32,25,39,300,46,825,43,34,125,
%T 946,51,27,203,47,52,3094,56,7060,62,127,302,54,71,13528,827,205,61,
%U 28659,79,40811,132,58,948,46658,65,81,99,304,210,57450,69,134,77,829
%N Position of second and last occurrence of n in A256918.
%C GCD(A257218(a(n)),A257218(a(n)-1)) = n;
%C a(n) > A257120(n); a(n) = A257120 + A257478(n).
%H Hiroaki Yamanouchi, <a href="/A257475/b257475.txt">Table of n, a(n) for n = 1..72</a>
%e Cf. A257478.
%o a257475 n = f 1 a256918_list where
%o f i (u:us) = (if u == n then g else f) (i + 1) us
%o g j (v:vs) = if v == n then j else g (j + 1) vs
%Y Cf. A256918, A257120, A257478, A257218.
%K nonn
%O 1,1
%A _Reinhard Zumkeller_, Apr 25 2015
%E a(38)-a(57) from _Hiroaki Yamanouchi_, May 03 2015
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