26900

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 82.at n=3A031760
• Every run of digits of n in base 3 has length 2.at n=35A033001
• Numbers k that divide phi(k)^2 + sigma(k)^2.at n=34A068484
• Smaller of two consecutive numbers with the same prime signature not occurring earlier.at n=15A091405
• a(n) = 16*n^2 + 4.at n=40A158444
• Magic sums of 4 X 4 magic squares composed of odd squares.at n=6A271582
• Numbers n such that n and n+1 both have 18 divisors.at n=3A274360
• T(n,k)=Number of nXk 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 2 1s.at n=46A295040
• Number of n X 2 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 4 1s.at n=8A295525
• T(n,k)=Number of nXk 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 4 1s.at n=46A295531
• G.f. A(x) satisfies: A(x) = 1/(1 + x*A(x)/(1 + x^2*A(x)/(1 + x^3*A(x)/(1 + x^4*A(x)/(1 + ...))))), a continued fraction.at n=12A301362
• Numbers k such that 445*2^k+1 is prime.at n=30A323151
• Numbers k such that k and k+1 both have more nonunitary than unitary prime divisors (A348121).at n=28A348122
• Number of distinct bracelets of length n (A000029) that eventually result in a cycle with length 2 or greater when used as the starting conditions for a rule 161 cellular automaton in a cyclic universe of circumference n.at n=19A367036