24139

Appears in sequences

• Nonprimes in A078447.at n=4A078877
• Sum of the second largest parts in the partitions of n into 5 parts.at n=47A308826
• a(n) appears in the congruences modulo 4 or 32 of Markoff numbers m(n) = A002559(n) for odd or even m(n).at n=30A309376
• a(n) = prime(n) * prime(2n).at n=25A319613
• Nonprime Heinz numbers of multiples of triangular partitions, or of finite arithmetic progressions with offset 0.at n=34A325407