Primes p such that p, p + 1, p + 2 and p + 3 have 2, 4, 6 and 8 divisors respectively.

Terms

a(0) =421a(1) =30661a(2) =50821a(3) =54421a(4) =130021a(5) =195541a(6) =423781a(7) =635461a(8) =1003381a(9) =1577941a(10) =1597381a(11) =1883941a(12) =2070421a(13) =2100661a(14) =2162581a(15) =2534821a(16) =2585941a(17) =2666581a(18) =2851621a(19) =3296581a(20) =3658021a(21) =3800581a(22) =4657381a(23) =4969141a(24) =5739541a(25) =5962741a(26) =6188821a(27) =6537301a(28) =6556741a(29) =7090261