33853

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 13.at n=30A031601
• Row 4 of square array defined in A047671.at n=13A047673
• Composite numbers not divisible by 2 or 3 which in base 3 contain their largest proper factor as a substring.at n=27A063132
• Number of nX7 0..1 arrays with every element equal to 0, 1 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=4A301883
• Number of 5Xn 0..1 arrays with every element equal to 0, 1 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=6A301888
• First of 5 consecutive semiprimes congruent to 1,2,3,4,5 (mod 6).at n=10A367104