Eigensequence of triangle A168316.

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =6a(5) =16a(6) =39a(7) =103a(8) =263a(9) =690a(10) =1791a(11) =4693a(12) =12247a(13) =32073a(14) =83869a(15) =219598a(16) =574658a(17) =1504540a(18) =3938272a(19) =10310703a(20) =26992036a(21) =70666516a(22) =185002819a(23) =484344843a(24) =1268019438a(25) =3319721050a(26) =8691111639a(27) =22753633693a(28) =59569705507a(29) =155955534688