30600

Appears in sequences

• Area of more than one Pythagorean triangle.at n=24A009127
• a(n) = 225*(n-1)*(n-2)/2.at n=15A027470
• a(n) = (2*n+1)*(11*n+1).at n=37A033575
• Numbers expressible as (a^2-1)(b^2-1) in at least 2 distinct ways (b>=a>1).at n=21A063067
• 9 times octagonal numbers: a(n) = 9*n*(3*n-2).at n=34A064201
• Reverse of largest prime factor of n = smallest prime factor of n+1; a(1)=1.at n=23A071393
• Smallest multiple of n^2 beginning with n.at n=29A078210
• Numbers k such that k^2 = x^3 + y^4 with positive integers x, y.at n=35A087209
• Numbers n divisible by exactly two nontrivial permutations (rearrangements) of the digits of n.at n=30A090057
• Expansion of g.f. Product((1+x^i)/(1-x^i),i=1..n-1)/(1-x^n), with n = 6.at n=35A091774
• Numbers n such that |Fibonacci(n) - prime(n)| is prime.at n=15A099381
• Series expansion for mean-squared radius of gyration of rectangles on square lattice.at n=9A121782
• Q(n,6), where Q(m,k) is defined in A127080 and A127137.at n=40A127148
• Numbers k such that k and k^2 use only the digits 0, 1, 3, 6 and 9.at n=59A136850
• Numbers k such that k and k^2 use only the digits 0, 2, 3, 6 and 9.at n=22A136894
• Numbers k such that k and k^2 use only the digits 0, 3, 4, 6 and 9.at n=27A136932
• Numbers k such that k and k^2 use only the digits 0, 3, 5, 6 and 9.at n=21A136939
• Numbers k such that k and k^2 use only the digits 0, 3, 6, 7 and 9.at n=21A136944
• Numbers k such that k and k^2 use only the digits 0, 3, 6, 8 and 9.at n=32A136945
• Numbers k such that k and k^2 use only the digits 0, 3, 6 and 9.at n=21A136946