Primes of the form floor(binomial(k,2)/4).

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =13a(6) =19a(7) =47a(8) =101a(9) =157a(10) =331a(11) =457a(12) =569a(13) =1069a(14) =1237a(15) =1471a(16) =1667a(17) =2161a(18) =2467a(19) =2719a(20) =3061a(21) =3719a(22) =4027a(23) =4441a(24) =5227a(25) =5591a(26) =6469a(27) =6991a(28) =7411a(29) =9011