Number of compositions of 7*n-3 into parts 6 and 7.

Terms

a(0) =0a(1) =0a(2) =1a(3) =4a(4) =10a(5) =20a(6) =35a(7) =56a(8) =85a(9) =131a(10) =231a(11) =506a(12) =1287a(13) =3367a(14) =8464a(15) =20026a(16) =44609a(17) =94334a(18) =191710a(19) =380190a(20) =748924a(21) =1491735a(22) =3044927a(23) =6398259a(24) =13770795a(25) =30031820a(26) =65615746a(27) =142422743a(28) =305750022a(29) =648652029