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Search: id:A143839
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| A143839 |
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Ulam/Prime spiral (SSE). |
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+0
1
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| 1, 24, 79, 166, 285, 436, 619, 834, 1081, 1360, 1671, 2014, 2389, 2796, 3235, 3706, 4209, 4744, 5311, 5910, 6541, 7204, 7899, 8626, 9385, 10176, 10999, 11854, 12741, 13660, 14611, 15594, 16609, 17656, 18735, 19846, 20989, 22164, 23371, 24610
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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a(n) = 16n^2-25n+10, n>1. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 04 2008]
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MATHEMATICA
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a=1; lst={a}; Do[AppendTo[lst, n*n-a]; a++, {n, 5, 6!, 4}]; lst
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CROSSREFS
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Sequence in context: A048352 A144459 A124140 this_sequence A114818 A068379 A060673
Adjacent sequences: A143836 A143837 A143838 this_sequence A143840 A143841 A143842
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KEYWORD
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nonn
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AUTHOR
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Vladimir Orlovsky (4vladimir(AT)gmail.com), Sep 02 2008
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