a(n) = Product_{i=0..6} floor((n+i)/7).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =1a(8) =2a(9) =4a(10) =8a(11) =16a(12) =32a(13) =64a(14) =128a(15) =192a(16) =288a(17) =432a(18) =648a(19) =972a(20) =1458a(21) =2187a(22) =2916a(23) =3888a(24) =5184a(25) =6912a(26) =9216a(27) =12288a(28) =16384a(29) =20480