124540416001domain: NAppears in sequencesSmallest prime obtained as k*n! concatenated with a 1 for some k.at n=13A089766Primes in the triangle defined by T(0,c)=1, T(1,c)=c, T(r,1)=1 and T(r,c) = T(r,c-1) + c*(r-1)!.at n=26A105071