Number of free pure identity multifunctions with one atom and n positions.

Terms

a(0) =1a(1) =0a(2) =1a(3) =0a(4) =2a(5) =2a(6) =5a(7) =10a(8) =18a(9) =46a(10) =94a(11) =212a(12) =476a(13) =1058a(14) =2441a(15) =5564a(16) =12880a(17) =29920a(18) =69620a(19) =163220a(20) =383376a(21) =904114a(22) =2139592a(23) =5074784a(24) =12074152a(25) =28789112a(26) =68803148a(27) =164779064a(28) =395373108a(29) =950416330