One of the two successive approximations up to 3^n for the 3-adic integer sqrt(-1/2).

Terms

a(0) =0a(1) =2a(2) =2a(3) =11a(4) =11a(5) =11a(6) =254a(7) =254a(8) =4628a(9) =11189a(10) =30872a(11) =89921a(12) =444215a(13) =444215a(14) =2038538a(15) =2038538a(16) =30736352a(17) =73783073a(18) =73783073a(19) =848624051a(20) =2010885518a(21) =8984454320a(22) =29905160726a(23) =61286220335a(24) =61286220335a(25) =626145293297a(26) =626145293297