23185

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 97.at n=11A020436
• 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 33.at n=2A031621
• Numbers n such that (273*2^n-1)^2-2 is prime.at n=46A100913
• Number of nonnegative even integers <= Fibonacci(n).at n=24A147997
• Where powers of 2 occur in the union of squares and powers of 2.at n=29A188917
• Numbers of graphs which are double triangle descendants of K_5 with four more vertices than triangles.at n=35A332735
• G.f. A(x) satisfies: A(x) = (1 + 4 * x * A(x)^3) / (1 - x).at n=4A349517
• G.f. A(x) satisfies: A(x) = 1 + x + x^2 + x^3 * A(x/(1 - x)) / (1 - x)^2.at n=13A351660
• Expansion of 1/( (1 + x) * (1 - x^2*(1 + x)^2) ).at n=24A375372