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

Terms

a(0) =4a(1) =13a(2) =30a(3) =54a(4) =95a(5) =121a(6) =185a(7) =259a(8) =376a(9) =450a(10) =643a(11) =750a(12) =992a(13) =1249a(14) =1580a(15) =1768a(16) =2232a(17) =2462a(18) =2998a(19) =3501a(20) =4117a(21) =4459a(22) =5276a(23) =5975a(24) =6855a(25) =7676a(26) =8696a(27) =9261a(28) =10648a(29) =11273