66676

Appears in sequences

• Number of plane regions after drawing (in general position) a convex n-gon and all its diagonals.at n=35A027927
• Pentagonal numbers (A000326) whose digit reversal is the product of 2 palindromes greater than 1.at n=23A115703
• a(n) = 2^n*Product_{k=1..floor((n-1)/2)} (1 + 2*cos(k*Pi/n)^2 + 4*cos(k*Pi/n)^4).at n=10A152103
• Numbers which have only digits 6 and 7 in base 10.at n=32A256292
• Number of faces in the n-polygon diagonal intersection graph.at n=33A301748
• Numbers that are the sum of seven fourth powers in exactly ten ways.at n=28A345832
• Number of integer partitions of n with integer median of 0-appended first differences.at n=43A360688