OFFSET
0,4
COMMENTS
For n>=6, a(n) >= prime(n+1).
a(n) gives the number of pairs within A002110(n) of the form {x, x^4} where x is nonzero positive integer. - Soumyadeep Dhar, May 16 2021
LINKS
Soumyadeep Dhar, Table of n, a(n) for n = 0..1154
MATHEMATICA
a = {}; Do[b = 1; Do[b = b Prime[x], {x, 1, n}]; AppendTo[a, Floor[b^(1/4)]], {n, 1, 50}]; a
PROG
(PARI) a(n)={sqrtnint(vecprod(primes(n)), 4)} \\ Andrew Howroyd, Apr 27 2021
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Jan 19 2007
EXTENSIONS
a(0)=1 prepended by Soumyadeep Dhar, Apr 28 2021
STATUS
approved