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%I #10 Dec 19 2014 14:16:46
%S -1,1,-1,1,1,1,1,1,-1,3,3,3,3,3,-1,7,7,7,7,7,7,5,1,1,1,1,1,1,1,-1,5,5,
%T 11,11,11,11,11,11,19,19,21,21,17,17,17,17,17,23,23,23,17,17,17,17,17,
%U 25,25,25,25,25,23,17
%N a(n) = A251546(n) - A251549(n).
%H Chai Wah Wu, <a href="/A251551/b251551.txt">Table of n, a(n) for n = 1..10000</a>
%o (Haskell)
%o a251551 n = a251546 n - a251549 n -- _Reinhard Zumkeller_, Dec 19 2014
%Y Cf. A098550, A247253, A251416, A251417, A251546-A251552.
%K sign
%O 1,10
%A _N. J. A. Sloane_, Dec 18 2014
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