65740domain: NAppears in sequencesSizes of successive increasing gaps between 2-pseudoprimes.at n=21A175738Number of ways to write n as an ordered sum of 10 squarefree numbers.at n=11A341070a(n) = [x^n] Product_{k=1..n} (x^prime(k) + 1 + 1/x^prime(k)).at n=15A369560