Number of compositions of 7*n-5 into parts 6 and 7.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =6a(6) =21a(7) =56a(8) =126a(9) =252a(10) =463a(11) =805a(12) =1378a(13) =2457a(14) =4823a(15) =10556a(16) =24753a(17) =58976a(18) =137808a(19) =310974a(20) =675850a(21) =1420916a(22) =2914906a(23) =5900631a(24) =11931283a(25) =24360194a(26) =50559900a(27) =106791426a(28) =228638698a(29) =492908713