Number of normal patterns matched by compositions of n.

Terms

a(0) =1a(1) =2a(2) =5a(3) =12a(4) =32a(5) =84a(6) =211a(7) =556a(8) =1446a(9) =3750a(10) =9824a(11) =25837a(12) =67681a(13) =178160a(14) =468941a(15) =1233837a(16) =3248788a(17) =8554709