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Search: id:A103520
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| A103520 |
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a(1) = 1, a(n) = product of n successive numbers starting with a(n-1) + 1. |
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+0
2
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| 1, 6, 504, 65813284680, 1234718152224069224489356305213161520251951242625962440
(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+1) = !{a(n)+n +1}/!{a(n)}
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EXAMPLE
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a(2) = 2*3 = 6, a(3) = 7*8*9 = 504.
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CROSSREFS
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Cf. A103519.
Sequence in context: A123278 A127605 A013975 this_sequence A003395 A000411 A121835
Adjacent sequences: A103517 A103518 A103519 this_sequence A103521 A103522 A103523
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KEYWORD
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easy,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 10 2005
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EXTENSIONS
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More terms from Olaf Voss (richyfourtythree(AT)yahoo.com), Feb 26 2005. (The next term is too large to include.)
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