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Search: id:A093844
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| A093844 |
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n-th row of the following triangle contains n terms of an arithmetic progression with the first term 1 such that the sum is the least possible n-th power. Sequence contains the leading diagonal. |
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+0
3
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| 1, 3, 17, 7, 1249, 15551, 235297, 419903, 86093441, 1999999999, 51874849201, 1486016741375, 46596170244961, 1587429546508287, 58385852050781249, 8191, 97322383751333736961, 4371823119477393063935, 208254700595822483065681
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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1
1 3
1 9 17
1 3 5 7
1 313 625 937 1249
1 3111 6221 9331 12441 15551
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PROGRAM
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(PARI) {a(n)=local(k); k=2; while(2*Mod(k, n)^n!=0||2*(Mod(k, n-1)^n-1)!=0, k++); 2*k^n/n-1} (Alekseyev)
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CROSSREFS
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Cf. A093460, A093845.
Cf. A093845, A110500.
Adjacent sequences: A093841 A093842 A093843 this_sequence A093845 A093846 A093847
Sequence in context: A090478 A140446 A124689 this_sequence A033467 A096475 A088122
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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 18 2004
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EXTENSIONS
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More terms from Max Alekseyev (maxal(AT)cs.ucsd.edu), Jul 23 2005
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