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Search: id:A073218
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| A073218 |
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The terms of A055258 (sums of two powers of 7) divided by 2. |
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+0
2
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| 1, 4, 7, 25, 28, 49, 172, 175, 196, 343, 1201, 1204, 1225, 1372, 2401, 8404, 8407, 8428, 8575, 9604, 16807, 58825, 58828, 58849, 58996, 60025, 67228, 117649, 411772, 411775, 411796, 411943, 412972, 420175, 470596, 823543
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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(7^n + 7^m) / 2, n = 0, 1, 2, 3 ..., m = 0, 1, 2, 3, ... n.
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EXAMPLE
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a(4) = 25 = (7^2+7^0) / 2
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CROSSREFS
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Cf. A055258.
Sequence in context: A143608 A079441 A129418 this_sequence A151348 A110413 A075686
Adjacent sequences: A073215 A073216 A073217 this_sequence A073219 A073220 A073221
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KEYWORD
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easy,nonn
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AUTHOR
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Jeremy Gardiner (jeremy.gardiner(AT)btinternet.com), Jul 21 2002
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