This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A270273 Array read by antidiagonals: T(n,m) = number of Hamiltonian cycles in C_n X C_m. 6
 0, 0, 0, 1, 1, 1, 1, 3, 3, 1, 1, 6, 48, 6, 1, 1, 5, 126, 126, 5, 1, 1, 8, 390, 1344, 390, 8, 1, 1, 7, 1014, 2930, 2930, 1014, 7, 1, 1, 10, 2982, 28060, 23580, 28060, 2982, 10, 1, 1, 9, 8094, 55230, 145210, 145210, 55230, 8094, 9, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,8 LINKS Andrew Howroyd, Table of n, a(n) for n = 1..191 Artem M. Karavaev, Hamilton Cycles Eric Weisstein's World of Mathematics, Hamiltonian Cycle Eric Weisstein's World of Mathematics, Torus Grid Graph FORMULA T(n,2) = A124349(n) / 2. EXAMPLE The start of the sequence as table: *   0 0    1     1       1        1         1 ... *   0 1    3     6       5        8         7 ... *   1 3   48   126     390     1014      2982 ... *   1 6  126  1344    2930    28060     55230 ... *   1 5  390  2930   23580   145210   1045940 ... *   1 8 1014 28060  145210  3273360  16111928 ... *   1 7 2982 55230 1045940 16111928 257165468 ... * ... CROSSREFS Main diagonal is A222199. Rows include A194952, A216588. Sequence in context: A084546 A288266 A174116 * A026515 A075772 A142157 Adjacent sequences:  A270270 A270271 A270272 * A270274 A270275 A270276 KEYWORD nonn,tabl AUTHOR Andrew Howroyd, Mar 14 2016 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified March 22 17:25 EDT 2019. Contains 321422 sequences. (Running on oeis4.)