323128

Appears in sequences

• Numerators of continued fraction convergents to sqrt(72).at n=6A041126
• a(n) = sqrt(2)*( (3+2*sqrt(2))^n - (3-2*sqrt(2))^n ).at n=7A081554
• a(n) = tau(n)*Pell(n), where tau(n) = A000005(n), the number of divisors of n.at n=13A204270
• a(n) = Pell(n)*A002652(n) for n>=1, with a(0)=1, where A002652 lists the coefficients in theta series of Kleinian lattice Z[(-1+sqrt(-7))/2].at n=14A209455
• Solutions y_n to the negative Pell equation y^2 = 72*x^2 - 8.at n=3A280761
• Lexicographically earliest sequence of distinct positive integers with no finite subset summing to a positive Pell number (A000129).at n=34A354005
• The number of unilevel points (unique points at their height) on Delannoy paths ending when x = n.at n=14A371596