868669

Properties

Appears in sequences

• Every digit of prime and its index contains a loop (only digits 0,4,6,8,9 in prime and its index).at n=23A107625
• Number of squares (of nonnegative integers) that require n binary (base-2) digits.at n=43A126726
• a(n) is the ceiling of 2^n * (sqrt(2)-1), i.e., a(n)-1 is the number whose binary representation gives the first n bits of sqrt(2)-1.at n=20A136322
• Base-7 pandigital primes: primes having at least one of each digit 0,...,6 when written in base 7.at n=24A175279
• Number of triangular numbers T(k) between powers of 2, 2^(n-1) < T(k) <= 2^n.at n=42A190660
• Prime numbersat n=68994