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Differences between A008586 (multiples of 4) and A242399.
5

%I #5 Jul 05 2014 13:08:09

%S 0,0,0,0,0,9,0,9,9,0,0,0,0,0,9,27,36,36,0,0,0,27,27,36,27,36,36,0,0,0,

%T 0,0,9,0,9,9,0,0,0,0,0,9,27,36,36,81,81,81,108,108,117,108,117,117,0,

%U 0,0,0,0,9,0,9,9,81,81,81,81,81,90,108,117,117,81

%N Differences between A008586 (multiples of 4) and A242399.

%C a(n) = A008586(n) - A242399(n);

%C a(m) = 0 iff m is a term of A242407;

%C a(A242407(n)) = 0; a(A242408(n)) > 0.

%H Reinhard Zumkeller, <a href="/A242400/b242400.txt">Table of n, a(n) for n = 0..10000</a>

%o (Haskell)

%o a242400 n = a008586 n - a242399 n

%Y Cf. A048728.

%K nonn

%O 0,6

%A _Reinhard Zumkeller_, May 13 2014