234741

Appears in sequences

• a(n) = (n^2 - n + 1)*(n^2 + n + 1).at n=22A059826
• Central polygonal numbers that are nontrivially the product of two central polygonal numbers.at n=29A203173
• Composite numbers of the form k^2+k+1 all of whose prime factors are of that same form.at n=20A353056
• a(n) is the number whose base-(n+1) expansion equals the binary expansion of n.at n=20A356274