Number of ordered partitions of partitions.

Terms

a(0) =1a(1) =1a(2) =3a(3) =8a(4) =22a(5) =59a(6) =160a(7) =431a(8) =1164a(9) =3140a(10) =8474a(11) =22864a(12) =61697a(13) =166476a(14) =449210a(15) =1212113a(16) =3270684a(17) =8825376a(18) =23813776a(19) =64257396a(20) =173387612a(21) =467856828a(22) =1262431711a(23) =3406456212a(24) =9191739970a(25) =24802339472a(26) =66924874539a(27) =180585336876a(28) =487278670744