809999
domain: N
Appears in sequences
- Convolution of nonzero squares A000290 with themselves.at n=28A033455
- One sixtieth the product of primitive Pythagorean triangles' sides whose odd values differ by 2.at n=14A081219
- Odd n dividing Fibonacci(n)-1 but neither Fibonacci(n-1) nor Fibonacci(n+1).at n=11A094400
- a(n) = n^4 - 1.at n=29A123865
- n^4 - 1 divided by its largest fourth power divisor.at n=28A128251
- Odd numbers that are one less than the square of a perfect power.at n=19A389956