Number of irreducible, unrooted, unoriented self-avoiding chains of length n for the square lattice.

A334325

Number of irreducible, unrooted, unoriented self-avoiding chains of length n for the square lattice.

Terms

    a(0) =2a(1) =2a(2) =4a(3) =8a(4) =20a(5) =42a(6) =100a(7) =228a(8) =540a(9) =1278a(10) =3088a(11) =7436a(12) =18176a(13) =44436a(14) =109536a(15) =270726a(16) =672400a(17) =1674764a(18) =4185888a(19) =10488914a(20) =26352252a(21) =66354472a(22) =167429028a(23) =423270120a(24) =1071908028a(25) =2718939372a(26) =6906918040a(27) =17569856618a(28) =44751600732a(29) =114121225984

External references