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A073220
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Terms of A072390 (sums of two powers of 13) divided by 2.
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0
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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
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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FORMULA
| (13^n + 13^m) / 2, n = 0, 1, 2, 3 ..., m = 0, 1, 2, 3, ... n.
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EXAMPLE
| a(4) = 85 = (11^2+11^0) / 2
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MATHEMATICA
| Union[Total/@Tuples[13^Range[0, 9], 2]]/2 (* From Harvey P. Dale, Sep 15 2011 *)
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CROSSREFS
| Cf. A072390.
Sequence in context: A177198 A177163 A061521 * A110455 A177952 A132373
Adjacent sequences: A073217 A073218 A073219 * A073221 A073222 A073223
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KEYWORD
| easy,nonn
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AUTHOR
| Jeremy Gardiner (jeremy.gardiner(AT)btinternet.com), Jul 21 2002
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