121367

Properties

Appears in sequences

• n*10^4-1, n*10^4-3, n*10^4-7 and n*10^4-9 are all prime.at n=29A064978
• a(n) = Fibonacci(n) - n.at n=26A065220
• Primes of the form F(k)-k where F(k) is the k-th Fibonacci number.at n=3A069109
• Primes p such that p+2, n*(p+2)+6 and p*(p+2)+8 are also prime.at n=23A130735
• Lesser member p of a twin prime pair (p, p + 2) such that 2p + 3(p + 2) is a perfect square.at n=12A174370
• Number of lower triangles of an n X n -4..4 array with all row and column sums zero.at n=4A195518
• T(n,k) = Number of lower triangles of an n X n -k..k array with all row and column sums zero.at n=32A195522
• Number of lower triangles of a 5 X 5 -n..n array with all row and column sums zero.at n=3A195523
• Prime numbersat n=11423