52157domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(874).at n=11A042689Numbers k such that (2*k)!/(2*(k!)^2) - 1 is prime.at n=36A112861Concatenation of n-th nonprime and n-th prime.at n=36A253911Pisot sequence E(8,12), a(n) = floor( a(n-1)^2/a(n-2) + 1/2 ).at n=21A274951