179401

Appears in sequences

• Number of plane regions after drawing (in general position) a convex n-gon and all its diagonals.at n=45A027927
• (Prime(prime(n))^2+1)/2.at n=28A092773
• Pentagonal numbers for which the sum of the digits is also a pentagonal number.at n=35A117709
• Pentagonal numbers for which both the sum of the digits and the product of the digits are pentagonal numbers.at n=21A117711
• A118860/210.at n=1A174293
• Pentagonal numbers (A000326) which are also centered square numbers (A001844).at n=5A254711