40930domain: NAppears in sequencesNumbers k that, when expressed in base 5 and then interpreted in base 7, give a multiple of k.at n=13A062929a(n) = 5*2^n - 2*n - 4.at n=13A097809Numbers such that the digital sums in bases 2, 3, 5 and 7 all are equal.at n=32A135127