83845

Appears in sequences

• Squarefree n such that the elliptic curve n*y^2 = x^3 - x arising in the "congruent number" problem has rank 3 and nontrivial SHA[2].at n=4A062694
• Triangular numbers with sum of digits = 28.at n=23A068132
• Triangular number x such that x + reverse of x is a prime.at n=21A072387
• Diagonal of the triangle A095225.at n=8A095226
• Number of length-5 0..n arrays with no following elements larger than the first repeated value.at n=8A267473
• a(n) = n^4 + 324.at n=17A272298
• The first of two consecutive triangular numbers the sum of which is equal to the sum of two consecutive prime numbers.at n=26A298462
• Hexagonal numbers that are sphenic numbers.at n=40A380007