38007

Appears in sequences

• a(n) is the least integer k such that there are n values of i <= k for which gpf(i^2 + 1) = gpf(k^2 + 1), where gpf(x) is the greatest prime factor of x.at n=34A258840
• a(n) = (4*n^3 - 6*n^2 + 20*n + 3)/3.at n=31A322597
• Largest number whose base-n expansion cannot be subdivided to form a sequence of numbers which ordered form a multiple of n+1 when using +, *, and ().at n=12A330671