Shadow of sqrt(2).

Terms

a(0) =1a(1) =15a(2) =157a(3) =170a(4) =175a(5) =181a(6) =183a(7) =186a(8) =193a(9) =223a(10) =232a(11) =282a(12) =286a(13) =294a(14) =374a(15) =390a(16) =478a(17) =550a(18) =970a(19) =1066a(20) =2046a(21) =2124a(22) =2180a(23) =3147a(24) =3165a(25) =3240a(26) =3277a(27) =3346a(28) =3826a(29) =3899