24337

Properties

Appears in sequences

• Primes of the form k^2 + 1.at n=28A002496
• a(1)=1, a(n) = n*18^(n-1) + a(n-1).at n=3A014935
• Triangle giving T(n,k) = number of (n,k) labeled rooted Greg trees (n >= 1, 0<=k<=n-1).at n=16A048160
• Odd powers of primes of the form q = x^2 + 1 (A002496).at n=37A054755
• Numbers whose divisors have the form m^k + 1, k>1.at n=30A054964
• a(n) = 1 + 2*n + 3*n^2 + 4*n^3.at n=18A056578
• Prime(n) and prime(n+3) use the same digits.at n=29A069795
• Primes p such that the period of the decimal expansion of 1/p is a square.at n=31A072858
• Primes p such that (p-1) and the period length of 1/p are both squares.at n=13A076516
• Smallest squarefree integer k such that Q(sqrt(k)) has class number n.at n=36A081363
• Smallest d such that real quadratic field with discriminant d has class number n.at n=36A081364
• Numerator of (1+1/n)^k - (1+k/n), 2<=k<=n, triangle read by rows.at n=14A099613
• Position where n (presumably) appears the last time in A107261, or 0 if n keeps appearing.at n=24A107262
• a(n) = 16*n^2 + 1.at n=38A108211
• Integers n such that n is prime and x is prime, where (x,y) is the smallest solution to the Pell equation with D = n.at n=21A109748
• Primes of the form 4*k^2 + 1.at n=27A121326
• Primes of the form 1 + 2*k + 3*k^2 + 4*k^3.at n=3A123059
• Primes associated with A127435.at n=12A127436
• Primes p for which the period length of 1/p is a perfect power, A001597.at n=40A128948
• a(n) = 7^n mod 6^n.at n=6A139786