Number of length n 1..(5+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal.
A254215
Number of length n 1..(5+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal.
Terms
- a(0) =3a(1) =2a(2) =12a(3) =24a(4) =70a(5) =192a(6) =633a(7) =2484a(8) =10554a(9) =35054a(10) =102520a(11) =337948a(12) =1366804a(13) =6000028a(14) =24951622a(15) =94266262a(16) =337342046a(17) =1263530794a(18) =5269371063a(19) =23209051416a(20) =98571237345a(21) =383041820280
External references
- oeis: A254215