OFFSET
1,1
REFERENCES
George Greaves, On the representation of a number as a sum of two fourth powers, MATHEMATISCHE ZEITSCHRIFT, Volume 94, Number 3 (1966), 223-234, DOI: 10.1007/BF01111351.
LINKS
Charles R Greathouse IV, Table of n, a(n) for n = 1..10000
EXAMPLE
a(1) = 3^4 + 1^4 = 82 = 2 * 41.
PROG
(PARI) issemi(n)=bigomega(n)==2
list(lim)=my(v=List(), t); for(x=1, (lim+.5)^(1/4), for(y=1, min(x, (lim-x^4 + .5)^(1/4)), if(issemi(t=x^4+y^4), listput(v, t)))); vecsort(Vec(v), , 8) \\ _Charles R Greathouse IV_, Apr 22 2012
CROSSREFS
KEYWORD
nonn
AUTHOR
_Jonathan Vos Post_, Apr 22 2012
EXTENSIONS
a(12)-a(40) from _Charles R Greathouse IV_, Apr 22 2012
STATUS
approved