545408

Appears in sequences

• Number of 2Xn 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=13A302368
• a(n) is the least x such that x^2 mod prime(i), i=1..n, are all distinct.at n=24A309090