Powers, squares excepted, of the form x^2+y^4, with x,y > 0 (see A111925).

Terms

a(0) =32a(1) =512a(2) =2197a(3) =3125a(4) =8000a(5) =8192a(6) =15625a(7) =64000a(8) =100000a(9) =131072a(10) =1419857a(11) =1953125a(12) =2097152a(13) =3200000a(14) =7189057a(15) =8000000a(16) =8998912a(17) =9765625a(18) =11390625a(19) =11881376a(20) =30664297a(21) =32768000a(22) =33554432a(23) =35287552a(24) =62748517a(25) =64000000a(26) =69343957a(27) =115856201a(28) =125000000a(29) =221445125