Primes p such that p+1, p+2 and p+3 have equal number of divisors.

Terms

a(0) =229a(1) =241a(2) =373a(3) =1831a(4) =2053a(5) =2503a(6) =3109a(7) =5861a(8) =6053a(9) =6151a(10) =6871a(11) =8293a(12) =8821a(13) =9161a(14) =9829a(15) =12049a(16) =13591a(17) =13781a(18) =14293a(19) =14887a(20) =16087a(21) =17737a(22) =19141a(23) =19333a(24) =20389a(25) =21493a(26) =23333a(27) =23509a(28) =24151a(29) =25771