42134

Appears in sequences

• Numbers n such that there are precisely 2 groups of order n and 3 of order n + 1.at n=35A296025
• Arises from enumeration of a certain class of partial knight's paths on the square grid.at n=15A368375
• a(n) is the index where n appears for first time in the list of first differences of the numbers with middle divisors.at n=23A390114