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Search: id:A089034
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| A089034 |
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a(n)={p^4 - 1}/240, where p=prime(n+3). |
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+0
1
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| 10, 61, 119, 348, 543, 1166, 2947, 3848, 7809, 11774, 14245, 20332, 32877, 50489, 57691, 83963, 105882, 118326, 162292, 197743, 261426, 368872, 433585, 468962, 546165, 588159, 679364, 1083936, 1227083, 1467814, 1555421, 2053685, 2166190
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OFFSET
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1,1
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COMMENT
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Mod 2, odd primes p are 1, and mod 4 or mod 6, p=-+1, so that p^2=p^4=1 (mod 2*4*6). Moreover, mod 5, p=-+1, -+2, for p>5, implying p^2=-+1 or p^4=1, so that finally p^4=1 (mod 2*4*6*5), i.e. 240 divides (p^4 - 1) for p>5.
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CROSSREFS
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Cf. A024702.
Adjacent sequences: A089031 A089032 A089033 this_sequence A089035 A089036 A089037
Sequence in context: A052664 A090373 A041184 this_sequence A025574 A015867 A106629
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KEYWORD
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nonn
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AUTHOR
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Lekraj Beedassy (blekraj(AT)yahoo.com), Nov 12 2003
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EXTENSIONS
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More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 12 2003
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