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A073220
Terms of A072390 (sums of two powers of 13) divided by 2.
0
1, 7, 13, 85, 91, 169, 1099, 1105, 1183, 2197, 14281, 14287, 14365, 15379, 28561, 185647, 185653, 185731, 186745, 199927, 371293, 2413405, 2413411, 2413489, 2414503, 2427685, 2599051, 4826809, 31374259, 31374265, 31374343, 31375357
OFFSET
1,2
FORMULA
(13^n + 13^m) / 2, n = 0, 1, 2, 3 ..., m = 0, 1, 2, 3, ... n.
EXAMPLE
a(4) = 85 = (11^2+11^0) / 2
MATHEMATICA
Union[Total/@Tuples[13^Range[0, 9], 2]]/2 (* Harvey P. Dale, Sep 15 2011 *)
CROSSREFS
Cf. A072390.
Sequence in context: A268350 A061521 A362246 * A110455 A177952 A320461
KEYWORD
easy,nonn
AUTHOR
Jeremy Gardiner, Jul 21 2002
STATUS
approved