Sum of squares of end-to-end distances for self-avoiding walks on the L lattice.

Terms

a(0) =1a(1) =4a(2) =12a(3) =32a(4) =78a(5) =180a(6) =400a(7) =864a(8) =1818a(9) =3756a(10) =7644a(11) =15360a(12) =30504a(13) =60012a(14) =117108a(15) =226912a(16) =436764a(17) =835940a(18) =1591790a(19) =3017408a(20) =5695448a(21) =10709604a(22) =20068182a(23) =37487152a(24) =69816450a(25) =129674484a(26) =240246868a(27) =444079488a(28) =819036168a(29) =1507514552