Number of compositions of 6*n-4 into parts 5 and 6.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =5a(5) =15a(6) =35a(7) =70a(8) =127a(9) =221a(10) =396a(11) =781a(12) =1716a(13) =4005a(14) =9390a(15) =21421a(16) =47107a(17) =100283a(18) =208982a(19) =432197a(20) =898064a(21) =1889152a(22) =4028036a(23) =8671852a(24) =18739049a(25) =40434205a(26) =86861995a(27) =185669195a(28) =395358538a(29) =840341619