Numbers which are the sum or difference of two seventh powers.

Terms

a(0) =0a(1) =1a(2) =2a(3) =127a(4) =128a(5) =129a(6) =256a(7) =2059a(8) =2186a(9) =2187a(10) =2188a(11) =2315a(12) =4374a(13) =14197a(14) =16256a(15) =16383a(16) =16384a(17) =16385a(18) =16512a(19) =18571a(20) =32768a(21) =61741a(22) =75938a(23) =77997a(24) =78124a(25) =78125a(26) =78126a(27) =78253a(28) =80312a(29) =94509