Number of terms in 9th derivative of a function composed with itself n times.

Terms

a(0) =1a(1) =30a(2) =210a(3) =867a(4) =2690a(5) =6956a(6) =15833a(7) =32775a(8) =63024a(9) =114235a(10) =197241a(11) =326976a(12) =523575a(13) =813671a(14) =1231910a(15) =1822706a(16) =2642259a(17) =3760860a(18) =5265508a(19) =7262865a(20) =9882576a(21) =13280982a(22) =17645255a(23) =23197985a(24) =30202250a(25) =38967201a(26) =49854195a(27) =63283510a(28) =79741677a(29) =99789465