Frequency of Grundy-Values of .104 in the period of length 11770282: 0 1451694 1 1451694 2 948197 3 948197 4 1288132 5 1288132 6 995733 7 995733 8 312380 9 312380 10 286607 11 286607 12 260430 13 260430 14 192952 15 192952 16 140705 17 140705 18 5847 19 5847 20 2331 21 2331 22 112 23 112 24 19 25 19 26 2 27 2 28 0 29 0 After half of the period the sequence is repeated by XOR 1 the values. Therefore the pairwise equal counters.