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Terms of A072390 (sums of two powers of 13) divided by 2.
0

%I #7 Nov 21 2013 12:47:51

%S 1,7,13,85,91,169,1099,1105,1183,2197,14281,14287,14365,15379,28561,

%T 185647,185653,185731,186745,199927,371293,2413405,2413411,2413489,

%U 2414503,2427685,2599051,4826809,31374259,31374265,31374343,31375357

%N Terms of A072390 (sums of two powers of 13) divided by 2.

%F (13^n + 13^m) / 2, n = 0, 1, 2, 3 ..., m = 0, 1, 2, 3, ... n.

%e a(4) = 85 = (11^2+11^0) / 2

%t Union[Total/@Tuples[13^Range[0,9],2]]/2 (* _Harvey P. Dale_, Sep 15 2011 *)

%Y Cf. A072390.

%K easy,nonn

%O 1,2

%A _Jeremy Gardiner_, Jul 21 2002