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A108570
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Squares of the form prime(n)*prime(n+1) - 2*prime(n).
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3
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9, 25, 121, 289, 841, 1681, 3481, 5041, 10201, 11449, 18769, 22201, 32041, 36481, 38809, 51529, 57121, 72361, 78961, 96721, 120409, 175561, 185761, 212521, 271441, 323761, 358801, 380689, 410881, 434281, 654481, 674041, 683929, 734449, 776161
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OFFSET
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1,1
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COMMENTS
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Squares of lesser of twin primes.
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LINKS
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Table of n, a(n) for n=1..35.
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MAPLE
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ZL:=[]:for p from 1 to 950 do if (isprime(p) and isprime(p+2)) then ZL:=[op(ZL), (p^2)]; fi; od; print(ZL); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 08 2007
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MATHEMATICA
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Select[First[#]Last[#]-2First[#]&/@Partition[Prime[Range[500]], 2, 1], IntegerQ[ Sqrt[#]]&] (* From Harvey P. Dale, May 24 2011 *)
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CROSSREFS
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Cf. A001359, A108604.
Sequence in context: A193644 A083100 A084058 * A092769 A139818 A146365
Adjacent sequences: A108567 A108568 A108569 * A108571 A108572 A108573
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KEYWORD
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easy,nonn
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AUTHOR
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Giovanni Teofilatto, Jul 05 2005
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EXTENSIONS
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Extended by Ray Chandler, Jul 10 2005
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STATUS
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approved
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