Ulam's Spirals : Table 5

k	obs#	pre#
41	86	83.02
107	69	66.65
101	68	66.39
227	66	62.31
221	65	61.60
347	59	59.17
377	60	59.89
389	58	55.95
311	60	57.08
17	60	63.68
359	54	53.55
161	57	54.63
367	53	54.35
137	55	53.33
353	52	50.18
251	53	53.15
257	52	50.53
59	50	55.00
307	49	46.03
67	51	51.53
125	44	47.47
239	47	47.46
191	49	47.30
47	48	49.97
179	43	45.04
11	48	51.23
37	37	37.43
87	15	18.39
43	16	17.20
85	19	16.65
51	16	17.62
27	16	16.86
3	14	17.13
39	16	14.58
21	14	13.92
9	13	13.74
99	11	10.45
45	12	11.34
15	11	10.75
93	11	9.80
33	10	9.07
63	6	8.82
75	10	8.29
453	7	6.22