466579domain: NPropertiesPrimalityPrimeyesAppears in sequencesBinomial sums: a(n) = Sum_{k=0..floor(n/3)} binomial(n-k,2*k)^2.at n=14A191349a(n) = Sum_{k=0..2*n/3} C(n-k,2*k-n)^2.at n=28A298567Prime numbersat n=38958