A203322 Numbers not of the form x^2+2*y^3+3*z^4 for nonnegative x, y, z.

8, 10, 13, 15, 22, 24, 26, 29, 31, 33, 34, 37, 40, 42, 43, 45, 46, 47, 53, 56, 60, 62, 71, 72, 74, 76, 77, 78, 85, 87, 88, 91, 92, 94, 95, 96, 98, 101, 104, 107, 108, 109, 110, 115, 117, 120, 122, 125, 130, 133, 134, 136, 139, 141, 142, 143, 152, 155, 158, 159, 161, 162, 165, 168, 170, 173, 179, 181, 182, 184, 186, 187, 189

Offset: 1

Author

N. J. A. Sloane, Jan 20 2012

Keywords

• nonn

Comments

Suggested by A055042.

Links

• Robert Israel, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A055042.

Programs

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