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A139294
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2^(2p - 1), where p is a Mersenne prime A000668(n).
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19
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OFFSET
| 1,1
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COMMENTS
| Next terms have 4932, 78913, 315652, 6196328015, ... decimal digits. - Charles R Greathouse IV (charles.greathouse(AT)case.edu), Oct 22 2009
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FORMULA
| a(n) = 2^(2*A000668(n)-1).
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CROSSREFS
| Cf. A000079, A000668, A139286, A139295, A139296, A139297, A139298, A139299, A139300, A139301, A139302, A139303, A139304, A139305, A139306.
Sequence in context: A086752 A159679 A139568 * A004147 A069444 A187240
Adjacent sequences: A139291 A139292 A139293 * A139295 A139296 A139297
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KEYWORD
| nonn
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AUTHOR
| Omar E. Pol (info(AT)polprimos.com), Apr 13 2008
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