Number of compositions of n into exactly n nonnegative parts <= six.

Terms

a(0) =1a(1) =1a(2) =3a(3) =10a(4) =35a(5) =126a(6) =462a(7) =1709a(8) =6371a(9) =23905a(10) =90178a(11) =341705a(12) =1299662a(13) =4958968a(14) =18973111a(15) =72763785a(16) =279636451a(17) =1076635399a(18) =4151948115a(19) =16035014604a(20) =62009441410a(21) =240083933750a(22) =930547077155