A334332 Number of endless self-avoiding walks of length n for the union jack lattice.
8, 56, 296, 1816, 10728, 62648, 365464, 2130488, 12424112, 72464136, 422680024, 2465699704, 14384367304, 83919450272, 489611186736, 2856635570680, 16667509269248, 97251708586688
Offset: 1