71983domain: NPropertiesPrimalityPrimeyesAppears in sequencesBase 6 digits are, in order, the first n terms of the periodic sequence with initial period 1,3.at n=6A037578Numerator of Sum[ (-1)^(k+1) * 1/p(k)^p(k), {k,1,n}], where p(k) = Prime[k].at n=2A122148Prime numbersat n=7125