Smallest number k such that omega(k)+ omega(k+1)+ omega(k+2)+ omega(k+3)= n.

Terms

a(0) =1a(1) =2a(2) =3a(3) =9a(4) =12a(5) =33a(6) =75a(7) =153a(8) =492a(9) =987a(10) =4179a(11) =13803a(12) =18444a(13) =134043a(14) =282489a(15) =1013724a(16) =4289592a(17) =12582633a(18) =57495513a(19) =260628717a(20) =801621093a(21) =3307216989a(22) =5313193818a(23) =62909521245a(24) =308935340153a(25) =611063815284