Number of 6-regular bipartitions of n.

Terms

a(0) =1a(1) =2a(2) =5a(3) =10a(4) =20a(5) =36a(6) =63a(7) =106a(8) =175a(9) =280a(10) =441a(11) =680a(12) =1034a(13) =1548a(14) =2290a(15) =3346a(16) =4840a(17) =6930a(18) =9837a(19) =13844a(20) =19337a(21) =26810a(22) =36925a(23) =50530a(24) =68741a(25) =92984a(26) =125113a(27) =167490a(28) =223155a(29) =295960