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A290042
a(n) = product of n consecutive primes starting with nextprime(a(n1)), with a(0) = 1.
1
1, 2, 15, 7429, 3080515841187929, 277406882783236415738415740236053512093193768766780577802245485078023713619433
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OFFSET
0,2
COMMENTS
The prime factors are
A290043
.
LINKS
Table of n, a(n) for n=0..5.
FORMULA
a(n) = Product_{k=n(n1)/2 + 1..n(n+1)/2}
A290043
(k) for n > 0.
EXAMPLE
a(1) = nextprime(1) = 2;
a(2) = nextprime(2)*nextprime(nextprime(2)) = 3*5 = 15;
a(3) = nextprime(15)*nextprime(nextprime(15))*nextprime(nextprime(nextprime(15))) = 17*19*23 = 7429.
CROSSREFS
Cf.
A290043
.
Sequence in context:
A064171
A365628
A135085
*
A080911
A175981
A056072
Adjacent sequences:
A290039
A290040
A290041
*
A290043
A290044
A290045
KEYWORD
nonn
AUTHOR
Jonathan Sondow
, Aug 20 2017
STATUS
approved
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Last modified May 27 03:56 EDT 2024. Contains 372847 sequences. (Running on oeis4.)