A052209 b(n)*b(2*n), b(n) = A001353(n+1).

4, 224, 11700, 608384, 31625044, 1643896800, 85451019364, 4441809150464, 230888624955300, 12001766689086944, 623860979209662484, 32428769152221187200, 1685672134936321275124, 87622522247536594107104

Offset: 0

Author

Gary W. Adamson, Feb 01 2000

Keywords

• nonn

Formula

G.f.: (-4x^2+4)/[(1-4x+x^2)(1-52x+x^2)].