Number of self-avoiding n-step walks on honeycomb lattice.

Terms

a(0) =1a(1) =3a(2) =6a(3) =12a(4) =24a(5) =48a(6) =90a(7) =174a(8) =336a(9) =648a(10) =1218a(11) =2328a(12) =4416a(13) =8388a(14) =15780a(15) =29892a(16) =56268a(17) =106200a(18) =199350a(19) =375504a(20) =704304a(21) =1323996a(22) =2479692a(23) =4654464a(24) =8710212a(25) =16328220a(26) =30526374a(27) =57161568a(28) =106794084a(29) =199788408