a(n) is the smallest m for which binomial(m,5) has exactly n distinct prime factors.

Terms

a(0) =6a(1) =9a(2) =11a(3) =22a(4) =25a(5) =70a(6) =78a(7) =276a(8) =497a(9) =990a(10) =1771a(11) =8178a(12) =20504a(13) =44254a(14) =181051a(15) =416328a(16) =1013728a(17) =3383579a(18) =8667726a(19) =34332376a(20) =122289552a(21) =244215150a(22) =969751302a(23) =1865174676a(24) =6648863728a(25) =26888317326a(26) =107132035803