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Search: id:A076274
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| A076274 |
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2p-1 where p is 1 or a prime. |
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+0
7
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| 1, 3, 5, 9, 13, 21, 25, 33, 37, 45, 57, 61, 73, 81, 85, 93, 105, 117, 121, 133, 141, 145, 157, 165, 177, 193, 201, 205, 213, 217, 225, 253, 261, 273, 277, 297, 301, 313, 325, 333, 345, 357, 361, 381, 385, 393, 397, 421, 445, 453, 457, 465, 477, 481, 501, 513, 525, 537, 541
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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A076271(a(n)) = A008578(n)^2 for all n;
a(n+1) - a(n) = 2*A075526(n) for all n.
1 together with (prime(n) plus phi(prime(n))). - Juri-Stepan Gerasimov (2stepan(AT0rambler.ru), Oct 10 2009
Or, 1 together with (2*(phi(nth prime))+number of perfect partitions of nth prime). - Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Oct 12 2009
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CROSSREFS
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Positions of squares in A076271.
Cf. A000010, A000040. - Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Oct 10 2009
Cf. A000010, A002033. - Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Oct 12 2009
Sequence in context: A033499 A106607 A007042 this_sequence A058989 A049691 A136252
Adjacent sequences: A076271 A076272 A076273 this_sequence A076275 A076276 A076277
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KEYWORD
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nonn
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AUTHOR
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Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 04 2002
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EXTENSIONS
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New definition from Thomas Baruchel (baruchel(AT)users.sourceforge.net), Oct 21 2003
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