Indices k where A057176(k) = 2.

Terms

a(0) =2a(1) =5a(2) =8a(3) =34a(4) =65a(5) =144a(6) =296a(7) =401a(8) =490a(9) =520a(10) =2165a(11) =3590a(12) =4640a(13) =4828a(14) =6828a(15) =8704a(16) =17675a(17) =21164a(18) =52883a(19) =84762a(20) =162069a(21) =358838a(22) =1463826a(23) =1593474a(24) =1668393a(25) =2086706a(26) =4364420a(27) =20471838a(28) =31960444