Number of length 5 1..(n+2) arrays with no leading partial sum equal to a prime.

Terms

a(0) =4a(1) =50a(2) =135a(3) =670a(4) =1087a(5) =3383a(6) =6814a(7) =13843a(8) =20012a(9) =37643a(10) =50271a(11) =84258a(12) =124243a(13) =185263a(14) =233753a(15) =347471a(16) =423430a(17) =594001a(18) =776949a(19) =1021618a(20) =1205883a(21) =1612046a(22) =2004761a(23) =2549617a(24) =3112664a(25) =3856074a(26) =4411319a(27) =5541449a(28) =6253712a(29) =7547845