278389

Appears in sequences

• Positive integer values of n such that 6*n^2-5 is a square.at n=11A080806
• a(n)*a(n+3) - a(n+1)*a(n+2) = 5, given a(0)=a(1)=1, a(2)=3.at n=12A080874
• Expansion of (1-x-sqrt(1-2*x-15*x^2))/(8*x^2).at n=10A091147
• a(1)=1, a(n) = a(n-1) + sum of odd numbers which are among the first (n-1) terms of the sequence.at n=17A131093
• a(n) = 10*a(n-1) - a(n-2) for n >= 2 with a(0) = 1 and a(1) = 3.at n=6A140780
• Numbers x such that sigma(x)=sigma(V(x)), where sigma(x) is the sum of the divisors of x and V(x) the transform defined in A245252.at n=31A245469
• Denominators of the other-side convergents to sqrt(6).at n=11A259594
• Heptagonal numbers (A000566) in which parity of digits alternates.at n=32A297646
• Numbers of uniquely embeddable trees on n vertices.at n=31A378672