133939

Appears in sequences

• a(n) = 7^n + 5^n + 3^n - 2^n. Constants are the prime numbers in decreasing order.at n=6A135167
• Sum of divisors of those odd squares k for which A379113(k) > 1, i.e., k that have a proper unitary divisor d > 1 such that A048720(A065621(sigma(d)),sigma(k/d)) is equal to sigma(k).at n=6A379125
• Right-truncatable happy numbers: every prefix is a happy number and no digits are zero.at n=36A383638