89168domain: NAppears in sequencesIndices of primes in sequence defined by A(0) = 67, A(n) = 10*A(n-1) + 27 for n > 0.at n=23A101542Number of segments needed to draw (on the infinite square grid) a diagram of regions and partitions of n.at n=40A211026Strobogrammatic nonpalindromic numbers.at n=47A287092