159340

Appears in sequences

• n-th Bell number of type D: Number of symmetric partitions of {-n,...,n}\{0} such that none of the subsets is of the form {j,-j}.at n=7A086365
• Numbers n such that n, n+1, and the sum of those two numbers each have 4 or more distinct prime factors.at n=11A168630
• Number of self-complementary set partitions of {1, ..., n} with no singletons.at n=16A324013
• a(n) is the index of the smallest square pyramidal number with exactly n distinct prime factors.at n=12A359230