A073880 - cp's OEIS frontend

A073880 a(1) = 1, a(n) = smallest palindrome not included earlier such that a(1)+...+a(n) is a palindrome.

n	a(n)
1	1
2	2
3	3
4	5
5	11
6	22
7	33
8	44
9	101
10	111
11	121
12	131
13	202
14	212
15	222
16	1001
17	1111
18	1221
19	1331
20	2002
21	2112
22	2222
23	10001
24	10101
25	10201
26	10301
27	11011
28	11111
29	12021
30	13031
31	22222
32	100001
33	101101
34	102201
35	103301
36	110011
37	111111
38	120021
39	130031
40	20202
41	1000001
42	1001001
43	1002001
44	1003001
45	1010101
46	1011101
47	1012101
48	1020201
49	2042402
50	10000001
51	10011001
52	10022001
53	10033001
54	10100101
55	10111101
56	10200201
57	10300301

[1, 2, 3, 5, 11, 22, 33, 44, 101, 111, 121, 131, 202, 212, 222, 1001, 1111, 1221, 1331, 2002, 2112, 2222, 10001, 10101, 10201, 10301, 11011, 11111, 12021, 13031, 22222, 100001, 101101, 102201, 103301, 110011, 111111, 120021, 130031, 20202, 1000001, 1001001, 1002001, 1003001, 1010101, 1011101, 1012101, 1020201, 2042402, 10000001, 10011001, 10022001, 10033001, 10100101, 10111101, 10200201, 10300301]

cp's OEIS Frontend

A073880 a(1) = 1, a(n) = smallest palindrome not included earlier such that a(1)+...+a(n) is a palindrome.

Table of values

List of values