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Search: id:A138402
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| A138402 |
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a(n) = (n-th prime)^4)-(n-th prime)^2. |
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+0
56
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| 12, 72, 600, 2352, 14520, 28392, 83232, 129960, 279312, 706440, 922560, 1872792, 2824080, 3416952, 4877472, 7887672, 12113880, 13842120, 20146632, 25406640, 28392912, 38943840, 47451432, 62734320, 88519872, 104050200, 112540272
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Differences p^k-p^m such that k > m:
p^2-p is given in A036689
p^3-p is given in A127917
p^3-p^2 is given in A135177
p^4-p is given in A138401
p^4-p^3 is given in A138403
p^5-p is given in A138404
p^5-p^2 is given in A138405
p^5-p^3 is given in A138406
p^5-p^4 is given in A138407
p^6-p is given in A138408
p^6-p^2 is given in A138409
p^6-p^3 is given in A138410
p^6-p^4 is given in A138411
p^6-p^5 is given in A138412
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MATHEMATICA
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a = {}; Do[p = Prime[n]; AppendTo[a, p^4 - p^2], {n, 1, 50}]; a
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CROSSREFS
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Cf. A036689, A127917, A135177, A138401, A138403, A138404, A138405, A138406, A138407, A138408, A138409, A138410, A138411, A138412.
Sequence in context: A126480 A030235 A088166 this_sequence A108734 A120793 A120783
Adjacent sequences: A138399 A138400 A138401 this_sequence A138403 A138404 A138405
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Mar 19 2008
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