Number of parts that are visible in one of the three views of the section model of partitions version "tree" with n sections.

A194805

Number of parts that are visible in one of the three views of the section model of partitions version "tree" with n sections.

Terms

    a(0) =0a(1) =1a(2) =2a(3) =4a(4) =7a(5) =11a(6) =17a(7) =25a(8) =36a(9) =51a(10) =71a(11) =97a(12) =132a(13) =177a(14) =235a(15) =310a(16) =406a(17) =527a(18) =681a(19) =874a(20) =1116a(21) =1418a(22) =1793a(23) =2256a(24) =2829a(25) =3532a(26) =4393a(27) =5445a(28) =6727a(29) =8282

External references