101268

Appears in sequences

• Number of n X 4 1..2 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nondecreasing order.at n=36A166805
• a(n) is the index of the smallest tetrahedral number with exactly n distinct prime factors.at n=12A359089
• a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} phi(i*j*k) / phi(j*k).at n=21A372663