129560domain: NAppears in sequencesa(n) = 324n^2 - 2n.at n=19A158305a(n) = 1600*n^2 - 40.at n=8A158773Principal diagonal of the convolution array A213819.at n=39A213820Number of length 6 1..(n+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal.at n=11A254223