Number of consistent sets of 4 irreflexive binary order relationships over n objects.

A147817

Number of consistent sets of 4 irreflexive binary order relationships over n objects.

Terms

    a(0) =186a(1) =3050a(2) =20790a(3) =93030a(4) =321580a(5) =930636a(6) =2362500a(7) =5420580a(8) =11473110a(9) =22732710a(10) =42628586a(11) =76289850a(12) =131160120a(13) =217765240a(14) =350657640a(15) =549562536a(16) =840752850a(17) =1258681410a(18) =1847900670a(19) =2665301870a(20) =3782707236a(21) =5289850500a(22) =7297782700a(23) =9942741900a(24) =13390527150

External references