Centered 20-gonal (or icosagonal) primes.

Terms

a(0) =61a(1) =421a(2) =1321a(3) =3061a(4) =4201a(5) =4621a(6) =5521a(7) =7561a(8) =12601a(9) =14821a(10) =15601a(11) =18061a(12) =19801a(13) =28621a(14) =35401a(15) =42901a(16) =44221a(17) =52561a(18) =55501a(19) =74821a(20) =76561a(21) =81901a(22) =87421a(23) =97021a(24) =109201a(25) =111301a(26) =115561a(27) =117721a(28) =131101a(29) =135721