Number of compositions of 7*n-2 into parts 6 and 7.

Terms

a(0) =0a(1) =1a(2) =3a(3) =6a(4) =10a(5) =15a(6) =21a(7) =29a(8) =46a(9) =100a(10) =275a(11) =781a(12) =2080a(13) =5097a(14) =11562a(15) =24583a(16) =49725a(17) =97376a(18) =188480a(19) =368734a(20) =742811a(21) =1553192a(22) =3353332a(23) =7372536a(24) =16261025a(25) =35583926a(26) =76806997a(27) =163327279a(28) =342902007a(29) =713848316