Alkane (or paraffin) numbers l(9,n).

Terms

a(0) =1a(1) =4a(2) =16a(3) =44a(4) =110a(5) =236a(6) =472a(7) =868a(8) =1519a(9) =2520a(10) =4032a(11) =6216a(12) =9324a(13) =13608a(14) =19440a(15) =27192a(16) =37389a(17) =50556a(18) =67408a(19) =88660a(20) =115258a(21) =148148a(22) =188552a(23) =237692a(24) =297115a(25) =368368a(26) =453376a(27) =554064a(28) =672792a(29) =811920