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Search: id:A130503
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| A130503 |
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a(n) = denominator of the sum of reciprocals of those positive integers which are <= n and are not among the first (n-1) terms of A130502. |
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+0
2
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| 1, 2, 6, 12, 12, 4, 28, 56, 504, 2520, 27720, 27720, 27720, 27720, 5544, 11088, 188496, 62832, 1193808, 5969040, 1989680, 1989680, 45762640, 137287920, 686439600, 8923714800, 80313433200, 80313433200, 2329089562800, 2329089562800
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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Diana Mecum, Table of n, a(n) for n = 1..200
Leroy Quet, Home Page (listed in lieu of email address)
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EXAMPLE
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The positive integers which are <= 9 and are missing from the first 8 terms of the (numerator) sequence A130502 are 2,3,4,6,7,8,9. So a(9) is the denominator of (1/2 +1/3 +1/4 +1/6 +1/7 +1/8 + 1/9 = 821/504).
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CROSSREFS
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Cf. A130502.
Sequence in context: A009230 A069491 A127698 this_sequence A074385 A057340 A092427
Adjacent sequences: A130500 A130501 A130502 this_sequence A130504 A130505 A130506
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KEYWORD
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frac,nonn
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AUTHOR
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Leroy Quet May 31 2007
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EXTENSIONS
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More terms from Diana Mecum (diana.mecum(AT)gmail.com), Jun 14 2007
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