2929687

Properties

Appears in sequences

• Sum_{T(i,j)}, 0<=j<=i, 0<=i<=n, where T is the array in A026386.at n=17A026396
• a(n) = (3*5^n - 1)/2.at n=9A057651
• a(n) = Sum_{k=0..n} C(floor((n+1)/2),floor((k+1)/2))*2^k.at n=18A097162
• Moore lower bound on the order of a (6,g)-cage.at n=16A198306
• a(n) = 5*a(n-2) + 2, a(0) = 1, a(1) = 2.at n=18A238366
• Primes p such that p == i mod d(i) where d(i) are the prime divisors of 2p+1.at n=35A281317
• Prime numbersat n=212101