OFFSET
1,1
COMMENTS
Suggested by A055042.
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
MAPLE
N:= 1000: # for terms <= N
E1:= {seq(3*z^4, z=0..floor((N/3)^(1/4)))}:
E2:= map(t -> seq(t+2*y^3, y=0..floor(((N-t)/2)^(1/3))), E1):
E3:= map(t -> seq(t+x^2, x=0..floor(sqrt(N-t))), E2):
sort(convert({$1..N} minus E3, list)); # Robert Israel, Aug 17 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 20 2012
STATUS
approved