Number of partitions of n such that either both floor(n/2) and ceiling(n/2) are parts or else neither is a part.

A238624

Number of partitions of n such that either both floor(n/2) and ceiling(n/2) are parts or else neither is a part.

Terms

    a(0) =0a(1) =2a(2) =2a(3) =5a(4) =4a(5) =11a(6) =9a(7) =22a(8) =20a(9) =42a(10) =40a(11) =77a(12) =77a(13) =135a(14) =141a(15) =231a(16) =247a(17) =385a(18) =420a(19) =627a(20) =696a(21) =1002a(22) =1124a(23) =1575a(24) =1782a(25) =2436a(26) =2776a(27) =3718a(28) =4256a(29) =5604

External references