A063519 - cp's OEIS frontend

A063519 Least composite k such that phi(k+12n) = phi(k)+12n and sigma(k+12n) = sigma(k) + 12n where phi is the Euler totient function and sigma is the sum of divisors function.

n	a(n)
1	65
2	95
3	341
4	95
5	161
6	115
7	629
8	203
9	145
10	203
11	365
12	155
13	185
14	155
15	301
16	185
17	329
18	235
19	1541
20	287
21	185
22	287
23	413
24	205
25	329
26	215
27	469
28	215
29	905
30	371
31	365
32	305
33	553
34	371
35	1037
36	235
37	1145
38	623
39	445
40	371
41	35249
42	295
43	1133
44	371
45	497
46	515
47	749
48	413
49	305
50	671
51	565

[65, 95, 341, 95, 161, 115, 629, 203, 145, 203, 365, 155, 185, 155, 301, 185, 329, 235, 1541, 287, 185, 287, 413, 205, 329, 215, 469, 215, 905, 371, 365, 305, 553, 371, 1037, 235, 1145, 623, 445, 371, 35249, 295, 1133, 371, 497, 515, 749, 413, 305, 671, 565]

cp's OEIS Frontend

A063519 Least composite k such that phi(k+12n) = phi(k)+12n and sigma(k+12n) = sigma(k) + 12n where phi is the Euler totient function and sigma is the sum of divisors function.

Table of values

List of values