Number of parts that are visible in one of the three views of the shell model of partitions version "Tree" with n shells.

A194803

Number of parts that are visible in one of the three views of the shell model of partitions version "Tree" with n shells.

Terms

    a(0) =0a(1) =1a(2) =3a(3) =5a(4) =8a(5) =11a(6) =17a(7) =23a(8) =33a(9) =46a(10) =64a(11) =86a(12) =121a(13) =161a(14) =217a(15) =291a(16) =388a(17) =507a(18) =671a(19) =870a(20) =1131a(21) =1458a(22) =1872a(23) =2383a(24) =3042a(25) =3840a(26) =4841a(27) =6076a(28) =7605a(29) =9460

External references