-1043

Appears in sequences

• G.f.: x^(k^2)/(mul(1-x^(2*i),i=1..k)*mul(1+x^(2*r-1),r=1..oo)) with k=4.at n=39A246580
• Expansion of (1 + 3*x)/(1 - 4*x + 7*x^2).at n=6A271972