Triangular array read by rows: a(n, k) = number of ordered factorizations of a "hook-type" number with n total prime factors and k distinct prime factors. "Hook-type" means that only one prime can have multiplicity > 1.
A098348
Triangular array read by rows: a(n, k) = number of ordered factorizations of a "hook-type" number with n total prime factors and k distinct prime factors. "Hook-type" means that only one prime can have multiplicity > 1.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =4a(4) =8a(5) =13a(6) =8a(7) =20a(8) =44a(9) =75a(10) =16a(11) =48a(12) =132a(13) =308a(14) =541a(15) =32a(16) =112a(17) =368a(18) =1076a(19) =2612a(20) =4683a(21) =64a(22) =256a(23) =976a(24) =3408a(25) =10404a(26) =25988a(27) =47293a(28) =128a(29) =576
External references
- oeis: A098348