100815domain: NAppears in sequencesSmallest j with n nodes in its riff (rooted index-functional forest).at n=19A062860Products of 5 distinct primes a,b,c,d,e, such that a+b+c+d+e are prime numbers.at n=29A178782MM-number of the set-system with BII-number n.at n=47A371450