124272

Appears in sequences

• Number of plane regions after drawing (in general position) a convex n-gon and all its diagonals.at n=41A027927
• Pentagonal numbers > 0 which are not the difference of two other pentagonal numbers > 0.at n=19A135769
• Pentagonal numbers > 0 which are not the difference of two larger pentagonal numbers.at n=28A136113
• p-INVERT of the positive integers, where p(S) = (1 - S)^4.at n=8A290919
• Number of faces in the n-polygon diagonal intersection graph.at n=39A301748