First of 9 consecutive primes in a 3 X 3 spiral wherein the mean of all 8 sums is prime.

Terms

a(0) =3a(1) =457a(2) =563a(3) =811a(4) =1571a(5) =1889a(6) =2203a(7) =2411a(8) =2917a(9) =3119a(10) =3209a(11) =3931a(12) =4079a(13) =4357a(14) =4507a(15) =4889a(16) =5087a(17) =5153a(18) =5387a(19) =5441a(20) =5749a(21) =5939a(22) =6043a(23) =6421a(24) =6871a(25) =6991a(26) =7079a(27) =7699a(28) =8929a(29) =9283