522134761

Properties

Appears in sequences

• a(n) in base n is the concatenation of the base n expansions of (1, 2, 3, ..., n-1, n, n-1, ..., 3, 2, 1).at n=5A260851
• Primes in A260851: numbers whose base n expansion is equal to the concatenation of the base n expansions of (1, 2, 3, ..., n-1, n, n-1, ..., 3, 2, 1).at n=3A260852
• Base-6 representation is the concatenation of the base-6 representations of 1, 2, ..., n, n-1, ..., 1.at n=6A260856
• Primes whose base-b representation is the concatenation of the base-b representations of (1, 2, ..., k, k-1, ..., 1), for some b > 1 and some k > 1.at n=5A260871
• Prime numbersat n=27458872