Number of binary enriched p-trees of weight n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =15a(6) =41a(7) =96a(8) =288a(9) =724a(10) =2142a(11) =5838a(12) =17720a(13) =49871a(14) =151846a(15) =440915a(16) =1363821a(17) =4019460a(18) =12460721a(19) =37374098a(20) =116809752a(21) =353904962a(22) =1109745666a(23) =3396806188a(24) =10712261952a(25) =33006706419a(26) =104357272687a(27) =323794643722