Sum of exponents in prime-power factorization of p(n)-3.

Terms

a(0) =0a(1) =0a(2) =1a(3) =2a(4) =3a(5) =2a(6) =2a(7) =4a(8) =3a(9) =2a(10) =3a(11) =2a(12) =2a(13) =4a(14) =3a(15) =3a(16) =4a(17) =2a(18) =6a(19) =3a(20) =3a(21) =3a(22) =5a(23) =2a(24) =2a(25) =3a(26) =4a(27) =4a(28) =2a(29) =3