121605

Appears in sequences

• Number of n X 4 binary arrays without the pattern 0 1 diagonally or vertically.at n=35A188838
• Number of curved edges among all distinct circles that can be constructed from the 3 vertices and the equally spaced 3*n points placed on the sides of an equilateral triangle, using only a compass.at n=7A372616
• Numbers k such that k^2 is an odd primitive abundant number (A006038).at n=4A379950
• Numbers k such that k^2 is abundant but d*k is nonabundant for any proper divisor d of k.at n=11A381742