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

Terms

a(0) =1a(1) =1a(2) =3a(3) =10a(4) =35a(5) =126a(6) =462a(7) =1716a(8) =6435a(9) =24301a(10) =92278a(11) =351990a(12) =1347710a(13) =5176640a(14) =19938348a(15) =76977360a(16) =297811491a(17) =1154300103a(18) =4481325903a(19) =17423296059a(20) =67830758310a(21) =264387659490