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Search: id:A093460
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| 1, 3, 17, 127, 1249, 15551, 235297, 4194303, 86093441, 1999999999, 51874849201, 1486016741375, 46596170244961, 1587429546508287, 58385852050781249, 2305843009213693951, 97322383751333736961, 4371823119477393063935
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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a(n)=A111568(n,n-1), i.e. diagonal of A111568. A111568 is the triangle whose n-th row contains n terms of the arithmetic progression having first term 1 and common difference 2[n^(n-1)-1]/(n-1). - Emeric Deutsch (deutsch(AT)duke.poly.edu), Aug 08 2005
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MAPLE
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a:=n->2*n^(n-1)-1: seq(a(n), n=1..20); (Deutsch)
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MATHEMATICA
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f[n_] := 2*n^(n-1) - 1; Table[f[i], {i, 1, 30}] (Propper)
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CROSSREFS
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Cf. A093461, A111568.
Sequence in context: A121572 A074543 A129115 this_sequence A089815 A006759 A073513
Adjacent sequences: A093457 A093458 A093459 this_sequence A093461 A093462 A093463
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 05 2004
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu) and Ryan Propper (rpropper(AT)stanford.edu), Aug 08 2005
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