Vertex number of a rectangular spiral which contains exactly between its edges the successive shells of the partitions of the positive integers.

A194450

Vertex number of a rectangular spiral which contains exactly between its edges the successive shells of the partitions of the positive integers.

Terms

    a(0) =0a(1) =1a(2) =2a(3) =4a(4) =6a(5) =9a(6) =12a(7) =17a(8) =21a(9) =28a(10) =33a(11) =44a(12) =50a(13) =65a(14) =72a(15) =94a(16) =102a(17) =132a(18) =141a(19) =183a(20) =193a(21) =249a(22) =260a(23) =337a(24) =349a(25) =450a(26) =463a(27) =598a(28) =612a(29) =788

External references