OFFSET
1,1
COMMENTS
Lubomir Alexandrov informs me that he studied this sequence in his 1965 notebook. - N. J. A. Sloane, May 23 2008
REFERENCES
Alexandrov, Lubomir. "On the nonasymptotic prime number distribution." arXiv preprint math/9811096 (1998). (See Appendix.)
LINKS
Lubomir Alexandrov, Prime Number Sequences And Matrices Generated By Counting Arithmetic Functions, Communications of the Joint Institute of Nuclear Research, E5-2002-55, Dubna, 2002.
MATHEMATICA
NestList[ Prime, 4, 13 ]
PROG
(Python)
from sympy import prime
from itertools import accumulate
def f(an, _): return prime(an)
print(list(accumulate([4]*12, f))) # Michael S. Branicky, Apr 07 2021
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Robert G. Wilson v, Sep 26 2000
EXTENSIONS
a(15)-a(17) from Robert G. Wilson v, Mar 07 2017 using Kim Walisch's primecount
STATUS
approved