Number of aperiodic arrays of positive integers summing to n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =5a(4) =11a(5) =33a(6) =57a(7) =157a(8) =303a(9) =683a(10) =1358a(11) =2974a(12) =5932a(13) =12560a(14) =25328a(15) =52400a(16) =106256a(17) =217875a(18) =441278a(19) =899955a(20) =1822703a(21) =3701401a(22) =7491173a(23) =15178253a(24) =30691135a(25) =62085846a(26) =125435689a(27) =253414326a(28) =511547323a(29) =1032427635