A065735 Largest square <= product of first n primes.

1, 4, 25, 196, 2304, 29929, 509796, 9696996, 223084096, 6469628356, 200559769921, 7420737154609, 304250260158441, 13082761295250201, 614889781233144561, 32589158470911505225, 1922760350143213168900

Offset

1,2

Links

Harry J. Smith, Table of n, a(n) for n = 1..100

Formula

a(n) = A048760(A002110(n)).

Mathematica

Floor[Sqrt[#]]^2&/@FoldList[Times, Prime[Range[20]]] (* Harvey P. Dale, Jan 13 2024 *)

Prog

(PARI) { m=1; for (n=1, 100, m*=prime(n); a=sqrtint(m)^2; write("b065735.txt", n, " ", a) ) } \\ Harry J. Smith, Oct 28 2009

Crossrefs

Cf. A048760, A002110, A065730-A065741.

Sequence in context: A151342 A001246 A202827 * A212694 A182953 A327074

Adjacent sequences: A065732 A065733 A065734 * A065736 A065737 A065738

Keyword

easy,nonn

Author

Labos Elemer, Nov 15 2001

Status

approved