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Search: id:A060189
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| 1, 23, 230, 1682, 10543, 60657, 331612, 1756340, 9116141, 46702427, 237231970, 1198382694, 6031771195, 30287995733, 151856096504, 760614930344, 3807336276505, 19050241098975, 95294209168414, 476607030432890
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OFFSET
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3,2
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REFERENCES
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P. A. MacMahon, The divisors of numbers, Proc. London Math. Soc., (2) 19 (1920), 305-340; Coll. Papers II, pp. 267-302.
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FORMULA
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5^(n-1) - n*3^(n-1) + n(n-1)/2. - R. Stephan, May 08 2004
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CROSSREFS
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Sequence in context: A124336 A010829 A022715 this_sequence A028824 A096983 A140572
Adjacent sequences: A060186 A060187 A060188 this_sequence A060190 A060191 A060192
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Mar 20 2001
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EXTENSIONS
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More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Mar 20 2001
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