Number of length n 1..(3+1) arrays with every leading partial sum divisible by 2, 3, 5 or 7.

A258626

Number of length n 1..(3+1) arrays with every leading partial sum divisible by 2, 3, 5 or 7.

Terms

    a(0) =3a(1) =12a(2) =45a(3) =130a(4) =331a(5) =834a(6) =2115a(7) =5726a(8) =16873a(9) =50003a(10) =142116a(11) =400694a(12) =1157686a(13) =3355089a(14) =9458656a(15) =26092189a(16) =72995360a(17) =213171551a(18) =647222852a(19) =1987679608a(20) =6016219942a(21) =17773719595a(22) =51564943489a(23) =148469880307a(24) =426108755766

External references