Alkane (or paraffin) numbers l(8,n).

Terms

a(0) =1a(1) =3a(2) =12a(3) =28a(4) =66a(5) =126a(6) =236a(7) =396a(8) =651a(9) =1001a(10) =1512a(11) =2184a(12) =3108a(13) =4284a(14) =5832a(15) =7752a(16) =10197a(17) =13167a(18) =16852a(19) =21252a(20) =26598a(21) =32890a(22) =40404a(23) =49140a(24) =59423a(25) =71253a(26) =85008a(27) =100688a(28) =118728a(29) =139128