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Search: id:A118750
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| A118750 |
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a(n) = product[k=1..n] P(k), where P(k) is the largest prime <= 3*k. a(n) = product[k=1..n] A118749(k). |
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+0
9
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| 3, 15, 105, 1155, 15015, 255255, 4849845, 111546435, 2565568005, 74401472145, 2306445636495, 71499814731345, 2645493145059765, 108465218947450365, 4664004414740365695, 219208207492797187665, 10302785752161467820255
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Differs from (after first term) A048599 "Partial products of the sequence (A001097) of twin primes" after 8th term. Differs from (after first term) A070826 "One half of product of first n primes A000040" after 9th term. Analogous to A118455 a(1)=1. a(n) = product{k=1..n} P(k), where P(k) is the largest prime <= k.
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CROSSREFS
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Cf. A020482, A049653, A060266-A060268, A060264, A060265, A060308, A118455, A118456, A118748.
Sequence in context: A015682 A001147 A000268 this_sequence A070826 A048599 A129731
Adjacent sequences: A118747 A118748 A118749 this_sequence A118751 A118752 A118753
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KEYWORD
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easy,nonn
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AUTHOR
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Jonathan Vos Post (jvospost3(AT)gmail.com), Apr 29 2006
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