Numbers k such that the decimal digits of k*(k+1) are a permutation of those of k*(k-1).

Terms

a(0) =153a(1) =729a(2) =900a(3) =3420a(4) =4221a(5) =4500a(6) =4779a(7) =4851a(8) =5400a(9) =9153a(10) =13500a(11) =13779a(12) =22500a(13) =24498a(14) =31500a(15) =36927a(16) =40500a(17) =46647a(18) =49221a(19) =49779a(20) =50202a(21) =55152a(22) =61353a(23) =68994a(24) =69894a(25) =77499a(26) =80064a(27) =82872a(28) =83637a(29) =84249