153553domain: NAppears in sequencesStrong pseudoprimes to base 22.at n=27A020248Haüy rhombic dodecahedral numbers.at n=21A046142Erroneous version of A046142.at n=22A085636Expansion of e.g.f. Product_{k>=1} exp(x^k/(1 + x^k)).at n=8A295794