This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A178373 #4 Mar 22 2013 14:11:39 %S A178373 81,25,1296,81,100,20736,50625,289,324,400,529,331776,14348907,841, %T A178373 810000,1089,1156,1296,1521,1600,1849,91125,2116,5308416,2601,7890481, %U A178373 459165024,601692057,3364,12960000,15752961,4225,4356,4624,5041,5184 %N A178373 a(n) = A001969(n)^A178253(n). %C A178373 a(n) is in A000069 for all n. %C A178373 Since A001969(n) = 2*n + A010060(n) it follows that this sequence has the same parity as A010060. %e A178373 A001969(1)=3, A178253(1)=4, a(1)=3^4=81. %o A178373 (PARI) a(n)=my(e=2*n--+hammingweight(n)%2, m=1); e>>=valuation(e, 2); while(hammingweight(e^m++)%2==0, ); e^m \\ _Charles R Greathouse IV_, Mar 22 2013 %Y A178373 Cf. A000069, A001969, A010060, A178253. %K A178373 easy,nonn %O A178373 1,1 %A A178373 _Jeremy Gardiner_, May 26 2010