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Search: id:A109367
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| A109367 |
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Squares of the form 2*p + 3, where p is a prime. |
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+0
3
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| 9, 25, 49, 121, 169, 361, 529, 625, 841, 961, 1369, 1681, 2209, 3025, 4225, 4489, 5329, 5929, 6241, 8281, 9409, 10201, 10609, 11881, 14161, 20449, 22801, 24025, 24649, 25921, 34969, 38809, 42025, 43681, 44521, 48841, 51529, 54289, 55225, 57121
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OFFSET
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0,1
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COMMENT
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The first seven terms are primes squared: 3^2, 5^2, 7^2, 11^2, 13^2, 17^2, 19^2, 23^2.
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FORMULA
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a(n) = A109358(n)^2 = 2*A098828(n) + 3.
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MATHEMATICA
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Select[Table[(2Prime[n] + 3)^(1/2), {n, 3500}], IntegerQ]^2 (*Chandler*)
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CROSSREFS
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Cf. A098828, A109358.
Sequence in context: A030156 A141768 A110284 this_sequence A110588 A038771 A045972
Adjacent sequences: A109364 A109365 A109366 this_sequence A109368 A109369 A109370
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KEYWORD
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nonn
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AUTHOR
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Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Aug 23 2005
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EXTENSIONS
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Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net) and Robert G. Wilson v (rgwv(at)rgwv.com), Aug 25 2005
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