Number of incongruent restricted disjoint covering systems (IRDCS) of length n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =0a(10) =2a(11) =0a(12) =0a(13) =0a(14) =0a(15) =0a(16) =4a(17) =6a(18) =18a(19) =14a(20) =26a(21) =84a(22) =88a(23) =46a(24) =176a(25) =380a(26) =812a(27) =844a(28) =1770a(29) =2164