Number of factorizations with 3 levels of parentheses indexed by prime signatures. A050340(A025487).

A050341

Number of factorizations with 3 levels of parentheses indexed by prime signatures. A050340(A025487).

Terms

    a(0) =1a(1) =1a(2) =5a(3) =5a(4) =15a(5) =25a(6) =55a(7) =105a(8) =35a(9) =170a(10) =145a(11) =425a(12) =205a(13) =571a(14) =660a(15) =1611a(16) =1010a(17) =1789a(18) =2938a(19) =1345a(20) =5941a(21) =315a(22) =3437a(23) =4596a(24) =5727a(25) =12047a(26) =7317a(27) =21190a(28) =2130a(29) =16533

External references