15120105

Appears in sequences

• Number of partitions of {1...n} containing 4 pairs of consecutive integers, where each pair is counted within a block and a string of more than 2 consecutive integers are counted two at a time.at n=9A105481
• Number of equational laws for magmas involving n operations, up to relabeling and symmetry.at n=7A376620
• Number of equational laws for magmas involving n operations, up to relabeling and symmetry, after removing nontrivial reflexive laws.at n=7A376640
• Smallest k for which A384834(k) = n.at n=21A386557