90106

Appears in sequences

• Numbers that are the same upside down (using only digits 0, 1, 6 and 9).at n=40A169731
• Number of nondecreasing arrangements of n+2 numbers in 0..4 with each number being the sum mod 5 of two others.at n=33A183907
• For 1<=x<=n, 1<=y<=n with gcd(x,y)=1, write 1 = gcd(x,y) = u*x+v*y with u,v minimal; a(n) = m^2*s, where s is the population variance of the values of v and m is the number of such values.at n=13A345693