

A118750


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).


8



3, 15, 105, 1155, 15015, 255255, 4849845, 111546435, 2565568005, 74401472145, 2306445636495, 71499814731345, 2645493145059765, 108465218947450365, 4664004414740365695, 219208207492797187665, 10302785752161467820255
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OFFSET

1,1


COMMENTS

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.


LINKS

Table of n, a(n) for n=1..17.


CROSSREFS

Cf. A020482, A049653, A060266A060268, A060264, A060265, A060308, A118455, A118456, A118748.
Sequence in context: A001147 A000268 A207818 * A070826 A048599 A129731
Adjacent sequences: A118747 A118748 A118749 * A118751 A118752 A118753


KEYWORD

easy,nonn


AUTHOR

Jonathan Vos Post, Apr 29 2006


STATUS

approved



