Number of sets that can be represented as a length-n combination of commas and braces, with elements possibly repeated.

A373516

Number of sets that can be represented as a length-n combination of commas and braces, with elements possibly repeated.

Terms

    a(0) =0a(1) =1a(2) =0a(3) =1a(4) =0a(5) =1a(6) =1a(7) =1a(8) =2a(9) =2a(10) =4a(11) =3a(12) =7a(13) =7a(14) =11a(15) =16a(16) =18a(17) =30a(18) =34a(19) =56a(20) =65a(21) =102a(22) =134a(23) =183a(24) =275a(25) =348a(26) =544a(27) =699a(28) =1057a(29) =1441

External references