A018831 - cp's OEIS frontend

A018831 Numbers n such that n is a substring of its square in base 7 (written in base 10).

n	a(n)
1	0
2	1
3	7
4	30
5	49
6	285
7	343
8	911
9	1900
10	2208
11	2401
12	13962
13	16807
14	59763
15	64098
16	69128
17	85880
18	97734
19	117649
20	195032
21	418341
22	754422
23	823543
24	2162126
25	2629229
26	2790841
27	3488518
28	3842400
29	4960401
30	5764801
31	7923812
32	8559490
33	15134882
34	19765943
35	31466333
36	36415297

[0, 1, 7, 30, 49, 285, 343, 911, 1900, 2208, 2401, 13962, 16807, 59763, 64098, 69128, 85880, 97734, 117649, 195032, 418341, 754422, 823543, 2162126, 2629229, 2790841, 3488518, 3842400, 4960401, 5764801, 7923812, 8559490, 15134882, 19765943, 31466333, 36415297]

cp's OEIS Frontend

A018831 Numbers n such that n is a substring of its square in base 7 (written in base 10).

Table of values

List of values