40741

Appears in sequences

• Number of partitions of n into parts not a multiple of 7. Also number of partitions with at most 6 parts of size 1 and differences between parts at distance 9 are greater than 1.at n=43A035985
• (1,3) entry of powers of the orthogonal design shown in A090592.at n=12A089181
• a(n) = prime(n) * prime(2n).at n=31A319613
• Nonprime Heinz numbers of multiples of triangular partitions, or of finite arithmetic progressions with offset 0.at n=42A325407