81896domain: NAppears in sequencesNumbers k such that (16*10^k - 19)/3 is prime.at n=34A271146p-INVERT of (0,1,0,1,0,1,...), where p(S) = 1 - S - S^2 - S^3 + S^4 + S^5.at n=15A291249Number of antichains of subsets of {1..n} with equal edge-sums.at n=8A326574