316710domain: NAppears in sequencesNumbers n such that sopf(n) = sopf(n+1) - sopf(n-1), where sopf(x) = sum of the distinct prime factors of x.at n=22A076525Numbers k such that if k = a*b, then a+b = reversal(k) for some integers a,b > 1.at n=24A161791Even octagonal pyramidal numbers (A002414).at n=33A218327