OFFSET
1,1
COMMENTS
a(10), if it exists, should be more than 5000. Is a(9)=71 the last term of sequence? - Peter J. C. Moses, Apr 19 2014
One can prove that a(9)=71 indeed is the last term of this sequence. - Vladimir Shevelev, Apr 19 2014.
REFERENCES
V. S. Shevelev, Multiplicative functions in the Fermi-Dirac arithmetic, Izvestia Vuzov of the North-Caucasus region, Nature sciences 4 (1996), 28-43 [Russian].
LINKS
S. Litsyn and V. S. Shevelev, On factorization of integers with restrictions on the exponent, INTEGERS: Electronic Journal of Combinatorial Number Theory, 7 (2007), #A33, 1-36.
EXAMPLE
7 is in the sequence, since 7! in the considered factorization is 5*7*9*16, and here we have 2 primes and 2 nonprimes.
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
Vladimir Shevelev, Apr 18 2014
EXTENSIONS
Terms a(7) - a(9) from Peter J. C. Moses, Apr 19 2014
STATUS
approved