The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A290042 a(n) = product of n consecutive primes starting with nextprime(a(n-1)), with a(0) = 1. 1
 1, 2, 15, 7429, 3080515841187929, 277406882783236415738415740236053512093193768766780577802245485078023713619433 (list; graph; refs; listen; history; text; internal format)
 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(n-1)/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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 27 03:56 EDT 2024. Contains 372847 sequences. (Running on oeis4.)