Prime number spiral (clockwise, Northeast spoke).

Terms

a(0) =2a(1) =5a(2) =41a(3) =127a(4) =269a(5) =467a(6) =751a(7) =1093a(8) =1523a(9) =2027a(10) =2621a(11) =3299a(12) =4007a(13) =4861a(14) =5749a(15) =6763a(16) =7867a(17) =9041a(18) =10273a(19) =11719a(20) =13121a(21) =14723a(22) =16319a(23) =18061a(24) =19963a(25) =21851a(26) =23857a(27) =26021a(28) =28289a(29) =30661