39203

Appears in sequences

• a(n) = Sum_{k=0..8} binomial(n,k).at n=16A008861
• a(n) = 2^(n-1) + ((1 + (-1)^n)/4)*binomial(n, n/2).at n=16A027306
• a(n) = Sum_{i=0..n} binomial(2*n, i).at n=8A032443
• a(n) = 2^n - C(n,0) - C(n,1) - ... - C(n,7).at n=16A035040
• Numbers that are the product of a pair of twin primes.at n=14A037074
• Number of independent vertex sets in the n-prism graph Y_n = K_2 X C_n (n > 2).at n=12A051927
• Composite numbers k that divide Fibonacci(k+1).at n=16A069107
• Product of twin primes of form (4*k+1,4*k+3), k>0.at n=7A071697
• Multiplicative closure of twin prime pair products (A037074).at n=30A074480
• Odd Fibonacci pseudoprimes: odd composite numbers k such that either (1) k divides Fibonacci(k-1) if k == +-1 (mod 5) or (2) k divides Fibonacci(k+1) if k == +-2 (mod 5).at n=25A081264
• a(n) = 6*a(n-1) - a(n-2) - 4, a(0)=3, a(1)=7.at n=6A081555
• a(n) = prime(2*n-1)*prime(2*n).at n=22A089581
• Numbers n such that n+1 and phi(n)+1 are both perfect squares.at n=27A089952
• Numbers k such that k+1 and sigma(k)+1 are both perfect squares.at n=18A089954
• Pierce expansion of 1/sqrt(2).at n=6A091831
• Odd composites m that divide Fibonacci(m)-1.at n=16A094394
• Odd numbers k that divide Lucas(k) + 1.at n=17A094399
• Numbers k that divide both Fibonacci(k+1) and Lucas(k) + 1.at n=10A094402
• Odd numbers k that divide Fibonacci(k) - 1 but not Fibonacci(k-1).at n=10A094409
• Numbers k that divide Fibonacci(k+1) but do not divide Fibonacci(k) + 1.at n=14A094412