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Search: id:A140497
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| A140497 |
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a(n) = 2p - number of digits of p^p, where p = n-th prime. |
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+0
1
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| 3, 4, 6, 8, 10, 11, 13, 13, 14, 15, 15, 15, 15, 15, 15, 14, 13, 13, 11, 10, 9, 8, 6, 4, 1, -1, -2, -4, -5, -6, -14, -16, -19, -20, -26, -28, -31, -35, -38, -42, -46, -47, -54, -56, -59, -60, -69, -78, -81, -83
(list; graph; listen)
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OFFSET
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1,1
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MAPLE
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a:=proc(n) local np, npp: np:=ithprime(n): npp:=convert(np^np, base, 10); 2*np-nops(npp) end proc: seq(a(n), n=1..50); [From Emeric Deutsch (deutsch(AT)duke.poly.edu), Aug 10 2008]
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CROSSREFS
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Sequence in context: A049433 A135251 A088070 this_sequence A029900 A003257 A047298
Adjacent sequences: A140494 A140495 A140496 this_sequence A140498 A140499 A140500
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KEYWORD
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base,sign
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AUTHOR
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Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jul 24 2008
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EXTENSIONS
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Corrected and extended by Emeric Deutsch (deutsch(AT)duke.poly.edu), Aug 10 2008
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