Number of lists of length n from {0..9} summing to n but not beginning with 0.

A071976

Number of lists of length n from {0..9} summing to n but not beginning with 0.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =20a(4) =70a(5) =252a(6) =924a(7) =3432a(8) =12870a(9) =48619a(10) =184735a(11) =705222a(12) =2702609a(13) =10390940a(14) =40062132a(15) =154830696a(16) =599641425a(17) =2326640877a(18) =9042327525a(19) =35194002709a(20) =137160956815a(21) =535193552973

External references