A090287 - cp's OEIS frontend

A090287 Smallest prime obtained by sandwiching n between a number with identical digits, or 0 if no such prime exists. Primes of the form k n k where all the digits of k are identical.

n	a(n)
0	101
1	313
2	727
3	131
4	11411
5	151
6	777767777
7	373
8	181
9	191
10	9109
11	0
12	7127
13	331333
14	991499
15	1151
16	3163
17	1171
18	1181
19	9199
20	1201
21	112111
22	0
23	1231
24	7247
25	3253
26	7777777777267777777777
27	1111271111
28	11128111
29	1291
30	1301
31	3313
32	1321
33	0
34	3343
35	333533
36	1361
37	3373
38	1381

[101, 313, 727, 131, 11411, 151, 777767777, 373, 181, 191, 9109, 0, 7127, 331333, 991499, 1151, 3163, 1171, 1181, 9199, 1201, 112111, 0, 1231, 7247, 3253, 7777777777267777777777, 1111271111, 11128111, 1291, 1301, 3313, 1321, 0, 3343, 333533, 1361, 3373, 1381]

cp's OEIS Frontend

A090287 Smallest prime obtained by sandwiching n between a number with identical digits, or 0 if no such prime exists. Primes of the form k n k where all the digits of k are identical.

Table of values

List of values