31243

Appears in sequences

• n written in fractional base 5/3.at n=43A024633
• Largest squarefree number k such that Q(sqrt(-k)) has class number n.at n=15A038552
• Denominators of continued fraction convergents to sqrt(234).at n=9A041437
• Number of 2Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 3 or 4 neighboring 1s.at n=10A297750
• Partial sums of A299281.at n=27A299282
• a(n) is the number of sets modulo n which can be formed by a finite arithmetic sequence.at n=40A331503
• Largest number k such that C(-k) is the cyclic group of order n, where C(D) is the class group of the quadratic field with discriminant D; or 0 if no such k exists.at n=15A357600