Smallest cube that begins and ends in n, or 0 if no such cube exists.

Terms

a(0) =0a(1) =1a(2) =21952a(3) =343a(4) =405224a(5) =5359375a(6) =636056a(7) =79507a(8) =8a(9) =970299a(10) =0a(11) =11712548511a(12) =1259712a(13) =138188413a(14) =0a(15) =0a(16) =16777216a(17) =17034106517a(18) =0a(19) =1902014919a(20) =0a(22) =0a(23) =23076099423a(24) =242970624a(25) =2543302125a(26) =0a(27) =27a(28) =2815166528a(29) =29503629a(30) =0