Numbers k such that k and 3^k end with the same two digits.

Terms

a(0) =87a(1) =187a(2) =287a(3) =387a(4) =487a(5) =587a(6) =687a(7) =787a(8) =887a(9) =987a(10) =1087a(11) =1187a(12) =1287a(13) =1387a(14) =1487a(15) =1587a(16) =1687a(17) =1787a(18) =1887a(19) =1987a(20) =2087a(21) =2187a(22) =2287a(23) =2387a(24) =2487a(25) =2587a(26) =2687a(27) =2787a(28) =2887a(29) =2987