Number of compositions of n with equal number of even and odd parts, both counted without multiplicity.

A242821

Number of compositions of n with equal number of even and odd parts, both counted without multiplicity.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =2a(4) =3a(5) =11a(6) =14a(7) =33a(8) =43a(9) =82a(10) =141a(11) =260a(12) =514a(13) =1049a(14) =2321a(15) =4789a(16) =10454a(17) =21735a(18) =46213a(19) =94782a(20) =196060a(21) =398662a(22) =810178a(23) =1631089a(24) =3278372a(25) =6556096a(26) =13088339a(27) =26063238a(28) =51824061a(29) =102926784

External references