Number of achiral simplicial 4-clusters with n cells.

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =6a(5) =20a(6) =51a(7) =184a(8) =550a(9) =2009a(10) =6487a(11) =23875a(12) =81724a(13) =302954a(14) =1078409a(15) =4034373a(16) =14771551a(17) =55789188a(18) =208526682a(19) =794933818a(20) =3017839193a(21) =11604938152a(22) =44590911769a(23) =172833268057a(24) =670520982414