64751

Appears in sequences

• Inscribe two circles of curvature 2 inside a circle of curvature -1. Sequence gives curvatures of the smallest circles that can be sequentially inscribed in such a diagram.at n=12A060790
• Numbers m such that pi(m) = prime(d_1*d_2*...*d_k) where d_1 d_2 ... d_k is the decimal expansion of m.at n=9A107120
• Number of -n..n arrays x(0..3) of 4 elements with zero sum, and adjacent elements not both strictly positive and not both strictly negative.at n=34A199899
• a(n) = n*(n + 5)*(n + 7)*(n + 10)/24 + 1.at n=30A323220
• Number of subsets of {1..n} such that some element can be written as a nonnegative linear combination of the others.at n=16A364914