The smallest number k such that k*2^n mod 3^n = 1.

Terms

a(0) =2a(1) =7a(2) =17a(3) =76a(4) =38a(5) =262a(6) =1589a(7) =4075a(8) =11879a(9) =35464a(10) =17732a(11) =363160a(12) =181580a(13) =90790a(14) =9611333a(15) =11980120a(16) =92083502a(17) =175181914a(18) =862431935a(19) =2174608168a(20) =1087304084a(21) =543652042a(22) =271826021a(23) =235493860078a(24) =117746930039a(26) =664903189592a(27) =332451594796a(28) =166225797398