50183

Appears in sequences

• Centered octahedral numbers (crystal ball sequence for cubic lattice).at n=33A001845
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 64.at n=6A031742
• Composite numbers k that divide Fibonacci(k+1).at n=19A069107
• 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=27A081264
• Numbers k that divide Fibonacci(k+1) but do not divide Fibonacci(k) + 1.at n=17A094412
• a(n) = 49*n^2 + 7.at n=31A158481
• Composite numbers k that divide both Fibonacci(k+1) and Fibonacci(2k+1)-1.at n=18A182504
• Composite numbers k that divide Fibonacci(k+1) or Fibonacci(k-1).at n=34A182554