Triangle read by rows: A007318 * A026794.

Terms

a(0) =1a(1) =2a(2) =1a(3) =5a(4) =2a(5) =1a(6) =13a(7) =4a(8) =3a(9) =1a(10) =34a(11) =9a(12) =6a(13) =4a(14) =1a(15) =88a(16) =22a(17) =11a(18) =10a(19) =5a(20) =1a(21) =225a(22) =55a(23) =22a(24) =20a(25) =15a(26) =6a(27) =1a(28) =569a(29) =137