Number of 4-step self-avoiding walks on an n X n X n cube summed over all starting positions.

Terms

a(0) =0a(1) =96a(2) =1104a(3) =3984a(4) =9612a(5) =18888a(6) =32712a(7) =51984a(8) =77604a(9) =110472a(10) =151488a(11) =201552a(12) =261564a(13) =332424a(14) =415032a(15) =510288a(16) =619092a(17) =742344a(18) =880944a(19) =1035792a(20) =1207788a(21) =1397832a(22) =1606824a(23) =1835664a(24) =2085252a(25) =2356488a(26) =2650272a(27) =2967504a(28) =3309084a(29) =3675912