82075domain: NAppears in sequencesExpansion of 1/((1-3x)(1-7x)(1-8x)(1-9x)).at n=4A028089Start of the first run of exactly n consecutive odd composite numbers.at n=26A075067Numbers n such that n and n+1 both have 18 divisors.at n=10A274360Abelian orders m for which there exist at least 4 groups of order m.at n=32A350323