A178373 a(n) = A001969(n)^A178253(n).

81, 25, 1296, 81, 100, 20736, 50625, 289, 324, 400, 529, 331776, 14348907, 841, 810000, 1089, 1156, 1296, 1521, 1600, 1849, 91125, 2116, 5308416, 2601, 7890481, 459165024, 601692057, 3364, 12960000, 15752961, 4225, 4356, 4624, 5041, 5184

Offset: 1

Author

Jeremy Gardiner, May 26 2010

Keywords

• easy
• nonn

Comments

a(n) is in A000069 for all n.

Since A001969(n) = 2*n + A010060(n) it follows that this sequence has the same parity as A010060.

Examples

			A001969(1)=3, A178253(1)=4, a(1)=3^4=81.
		

Crossrefs

Cf. A000069, A001969, A010060, A178253.

Programs

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