180814domain: NAppears in sequencesd such that the smallest prime p for which p+d is also prime is larger than for any smaller d.at n=20A101046a(n) = 9*a(n-2) - 4*a(n-3) for n > 2 with a(0)=1, a(1)=2.at n=12A122109Number of (n+6)X(n+6) 0..1 matrices with each 7X7 subblock idempotent.at n=12A224580