87999

Appears in sequences

• Numbers that require exactly 8 iterations to determine that they are happy or not (A007770 and A031177).at n=12A193996
• Positive integers n such that prime(n+i) is a primitive root modulo prime(n+j) for any distinct i and j among 0, 1, 2, 3.at n=15A243839
• Inverse of the Fibonacci sequence beginning 1,1 with respect to binomial convolution.at n=10A374917