Number of compositions of n such that each part is adjacent to an equal part.

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =2a(5) =1a(6) =5a(7) =3a(8) =10a(9) =10a(10) =21a(11) =22a(12) =49a(13) =51a(14) =105a(15) =126a(16) =233a(17) =292a(18) =529a(19) =678a(20) =1181a(21) =1585a(22) =2654a(23) =3654a(24) =6016a(25) =8416a(26) =13606a(27) =19395a(28) =30840a(29) =44517