A068633 - cp's OEIS frontend

A068633 a(1) = 11 by convention; for n > 1, if n = p^a*q^b... then a(n) = concatenate(p,a,q,b,...).

n	a(n)
1	11
2	21
3	31
4	22
5	51
6	2131
7	71
8	23
9	32
10	2151
11	111
12	2231
13	131
14	2171
15	3151
16	24
17	171
18	2132
19	191
20	2251
21	3171
22	21111
23	231
24	2331
25	52
26	21131
27	33
28	2271
29	291
30	213151
31	311
32	25
33	31111
34	21171
35	5171
36	2232
37	371
38	21191
39	31131
40	2351
41	411
42	213171
43	431
44	22111

[11, 21, 31, 22, 51, 2131, 71, 23, 32, 2151, 111, 2231, 131, 2171, 3151, 24, 171, 2132, 191, 2251, 3171, 21111, 231, 2331, 52, 21131, 33, 2271, 291, 213151, 311, 25, 31111, 21171, 5171, 2232, 371, 21191, 31131, 2351, 411, 213171, 431, 22111]

cp's OEIS Frontend

A068633 a(1) = 11 by convention; for n > 1, if n = p^a*q^b... then a(n) = concatenate(p,a,q,b,...).

Table of values

List of values