80754domain: NAppears in sequencesTotal number of right truncatable primes in base n.at n=37A076586a(n) = 1 + (144 + (50 + (35 + (10 + n)*n)*n)*n)*n/120.at n=23A145127Number of cyclic arrangements of S={1,2,...,2n} such that the difference between any two neighbors is 3^k for some k=0,1,2,...at n=9A242520