297921

Appears in sequences

• Expansion of 1/(1-2*x+2*x^2+x^3).at n=24A077944
• Expansion of 1/(1+2*x+2*x^2-x^3).at n=24A077992
• a(n) = (n^4 - n^3 + 4*n^2 + 2)/2.at n=28A239592