87031

Appears in sequences

• Composite numbers equal to the sum of the prime factors, with multiplicity, of the previous k numbers, for some k.at n=15A257525
• Numbers equal to the sum of the prime factors, with multiplicity, of the previous k numbers, for some k.at n=19A257976
• Number of set partitions of [n] into exactly four parts such that no part contains two elements with a circular distance less than three.at n=17A261480