13623482

Appears in sequences

• a(0) = 1, a(1) = 2, a(n) = 4*a(n-1) - a(n-2).at n=13A001075
• Related to Genocchi numbers.at n=12A002317
• a(2*n) = a(2*n-1) + a(2*n-2), a(2*n+1) = 2*a(2*n) + a(2*n-1); a(0) = a(1) = 1.at n=26A002531
• a(n) = (1 + a(n-1)*a(n-2))/a(n-3), a(0) = a(1) = a(2) = 1.at n=27A005246
• a(n) = 14*a(n-1) - a(n-2); a(0) = a(1) = 2.at n=7A094347
• Interleave denominators and numerators of convergents to sqrt(3).at n=38A140827
• Numerators of principal and intermediate convergents to 3^(1/2).at n=37A143642
• Denominators of the other-side convergents to sqrt(3).at n=25A259592
• Numerators of the other-side convergents to sqrt(3).at n=24A259593