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Search: id:A001242
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| A001242 |
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Differences of reciprocals of unity.
(Formerly M5433 N2362)
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+0
7
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| 1, 274, 48076, 6998824, 929081776, 117550462624, 14500866102976, 1765130436471424, 213373597575314176, 25700650466807540224, 3089923562153380965376, 371145495540181143169024
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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F. N. David, M. G. Kendall and D. E. Barton, Symmetric Function and Allied Tables, Cambridge, 1966, p. 228.
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FORMULA
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G.f.: x / [(1-24x)(1-30x)(1-40x)(1-60x)(1-120x) ].
(1/24) [24^n - 4*30^n + 6*40^n - 4*60^n + 120^n ].
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CROSSREFS
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Equals 2^(n-1) * A103878(n).
Right-hand column 4 in triangle A008969.
Cf. a(n)=A112492(n+3, 5).
Sequence in context: A028530 A029567 A028534 this_sequence A023681 A070272 A066127
Adjacent sequences: A001239 A001240 A001241 this_sequence A001243 A001244 A001245
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KEYWORD
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nonn
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AUTHOR
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njas
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EXTENSIONS
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Formulae and more terms from Ralf Stephan, Feb 20 2005
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