A280926 - cp's OEIS frontend

A280926 Least k such that the first n digits of the decimal expansion of the ratio of the perimeter of a regular k-gon to its diameter match those of Pi.

n	a(n)
1	5
2	7
3	29
4	47
5	119
6	699
7	1407
8	4911
9	18971
10	46803
11	119951
12	363209
13	1276197
14	3722389
15	19973297
16	73605289
17	183273481
18	390720475
19	1671075265
20	4541314567
21	22107473795
22	44810965685
23	172567099183
24	617945607281
25	1835952288687
26	3938674815741
27	19847928172101

[5, 7, 29, 47, 119, 699, 1407, 4911, 18971, 46803, 119951, 363209, 1276197, 3722389, 19973297, 73605289, 183273481, 390720475, 1671075265, 4541314567, 22107473795, 44810965685, 172567099183, 617945607281, 1835952288687, 3938674815741, 19847928172101]

cp's OEIS Frontend

A280926 Least k such that the first n digits of the decimal expansion of the ratio of the perimeter of a regular k-gon to its diameter match those of Pi.

Table of values

List of values