-271443

Appears in sequences

• Expansion of (1-2*x)/(1+x-x^2).at n=25A075193
• Sum of Lucas numbers and inverted Lucas numbers: a(n) = A000032(n)*A075193(n).at n=27A075270
• a(n)=A128056(n)/A128055(n).at n=25A128053
• a(n)=A128056(n)/A128055(n).at n=26A128053
• Alternating row sums of Riordan triangle A110162.at n=13A219233