40398domain: NAppears in sequencesSum of 12 positive 9th powers.at n=27A004801a(n) = Sum_{k=0..floor(n/4)} binomial(n-2k, 2k)*2^(n-4k).at n=13A100131Number of length 6+2 0..n arrays with every three consecutive terms having the sum of some two elements equal to twice the third.at n=22A248439