Numbers expressible in more than one way as 6^x-y^2.

Terms

a(0) =0a(1) =20a(2) =32a(3) =95a(4) =207a(5) =720a(6) =1152a(7) =1215a(8) =1287a(9) =3420a(10) =3807a(11) =6255a(12) =6407a(13) =7452a(14) =7767a(15) =18095a(16) =23247a(17) =25920a(18) =41472a(19) =43740a(20) =46332a(21) =46647a(22) =69255a(23) =123120a(24) =137052a(25) =174087a(26) =211815a(27) =217935a(28) =225180a(29) =230652