n = k^2 - (reversal of k)^2 for two different values of k.

Terms

a(0) =891a(1) =1485a(2) =1584a(3) =2376a(4) =3168a(5) =4455a(6) =4752a(7) =89991a(8) =95931a(9) =101871a(10) =107811a(11) =149985a(12) =155925a(13) =159984a(14) =161865a(15) =167805a(16) =167904a(17) =175824a(18) =183744a(19) =191664a(20) =239976a(21) =247896a(22) =255816a(23) =263736a(24) =271656a(25) =319968a(26) =327888a(27) =335808a(28) =343728a(29) =351648