Primes in A005891 = Centered pentagonal numbers: (5n^2 + 5n + 2)/2.

Terms

a(0) =31a(1) =181a(2) =331a(3) =601a(4) =1051a(5) =1381a(6) =3331a(7) =4951a(8) =5641a(9) =5881a(10) =9151a(11) =11731a(12) =12781a(13) =14251a(14) =17431a(15) =17851a(16) =19141a(17) =21391a(18) =31081a(19) =33931a(20) =41281a(21) =43891a(22) =51481a(23) =52201a(24) =61231a(25) =63601a(26) =67651a(27) =70141a(28) =70981a(29) =84181