Irregular triangle read by rows: T(n, k) is the number of n-step closed walks on the hexagonal lattice having algebraic area k.
A353091
Irregular triangle read by rows: T(n, k) is the number of n-step closed walks on the hexagonal lattice having algebraic area k.
Terms
- a(0) =1a(1) =6a(2) =0a(3) =6a(4) =66a(5) =0a(6) =12a(7) =0a(8) =150a(9) =0a(10) =30a(11) =1020a(12) =0a(13) =420a(14) =0a(15) =84a(16) =0a(17) =6a(18) =0a(19) =3444a(20) =0a(21) =1302a(22) =0a(23) =252a(24) =0a(25) =42a(26) =19890a(27) =0a(28) =11952a(29) =0
External references
- oeis: A353091