Number of length n 1..(3+2) arrays with no leading or trailing partial sum equal to a prime.

A254199

Number of length n 1..(3+2) arrays with no leading or trailing partial sum equal to a prime.

Terms

    a(0) =2a(1) =1a(2) =4a(3) =9a(4) =21a(5) =47a(6) =118a(7) =333a(8) =984a(9) =3362a(10) =12643a(11) =39490a(12) =98542a(13) =227138a(14) =581068a(15) =1805114a(16) =6540668a(17) =24406560a(18) =85426548a(19) =274421967a(20) =815755674a(21) =2293410096a(22) =6495970695a(23) =20483223847a(24) =74509476318a(25) =290215121856

External references