Number of compositions of 6*n-2 into parts 1 and 6.

Terms

a(0) =1a(1) =6a(2) =27a(3) =119a(4) =533a(5) =2402a(6) =10829a(7) =48804a(8) =219925a(9) =991044a(10) =4465957a(11) =20125051a(12) =90690002a(13) =408678475a(14) =1841637299a(15) =8299012941a(16) =37398034921a(17) =168527634148a(18) =759439995404