61507

Properties

Appears in sequences

• q-Fibonacci numbers for q=3, scale a(n-1).at n=5A015474
• Palindromic primes in base 3.at n=28A029971
• Primes of the form k^2 + 3.at n=34A049423
• Numbers n such that 10000000n+1, 10000000n+3, 10000000n+7, 10000000n+9 are all primes.at n=3A064966
• a(1) = 1; for n > 1, a(n) is the least k > a(n-1) such that a(n) + a(n-1) is square and a(n) - a(n-1) is prime.at n=31A108972
• Duplicate of A049423.at n=34A121825
• Consider the array T(n, m) = m-th prime of the form n*i(i+1)/2 +/- 1. This sequence is the main diagonal.at n=26A125765
• Primes whose base-3 representation also is the base-2 representation of a prime.at n=47A235265
• Primes whose base-9 representation also is the base-4 representation of a prime.at n=24A235619
• Number of partitions of n such that the number of parts is not a part and the number of distinct parts is a part.at n=49A241378
• Least prime p such that p*10^n+1, p*10^n+3, p*10^n+7 and p*10^n+9 are all prime.at n=6A242564
• Prime numbersat n=6187