214739

Appears in sequences

• Fibonacci sequence beginning 1, 19.at n=21A022109
• a(n) = n*F(n) + (n-1)*F(n-1).at n=19A136376
• Number of n-bead necklaces labeled with numbers -3..3 allowing reversal, with sum zero and first and second differences in -3..3.at n=12A208965