Number of palindromic double occurrence words of length 2n.

A195186

Number of palindromic double occurrence words of length 2n.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =20a(4) =72a(5) =290a(6) =1198a(7) =5452a(8) =25176a(9) =125874a(10) =637926a(11) =3448708a(12) =18919048a(13) =109412210a(14) =642798510a(15) =3945170012a(16) =24614491704a(17) =159328958690

External references