1050601

Appears in sequences

• Denominators of continued fraction convergents to sqrt(26).at n=6A041041
• Denominators of continued fraction convergents to sqrt(104).at n=6A041187
• Denominators of continued fraction convergents to sqrt(234).at n=14A041437
• Denominators of continued fraction convergents to sqrt(416).at n=14A041791
• Denominators of continued fraction convergents to sqrt(650).at n=6A042249
• Denominators of continued fraction convergents to sqrt(936).at n=14A042811
• Pell equation solutions (5*b(n))^2 - 26*a(n)^2 = -1 with b(n) = A097726(n), n >= 0.at n=3A097727
• a(1)=1. a(2n+1) = sum{k=1 to 2n} a(k). a(2n) = the smallest positive integer not yet occurring in the sequence.at n=36A140598
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 0), (0, 1, 0), (1, -1, -1), (1, 0, 1)}.at n=11A150009
• For n even a(n) = a(n-1) + a(n-2), for n odd a(n) = 100*a(n-1) + a(n-2), with a(0) = 0, a(1) = 1.at n=7A162671
• Array read by antidiagonals of a(n) = a(n-1)*k-((k-1)/(k^n)) where a(0)=1 and k=(sqrt(x^2+1)+x)^2 for integers x>=1.at n=32A188647
• Hypotenuses of primitive Pythagorean triples in A195571 and A195572.at n=9A195573