A098475 - cp's OEIS frontend

A098475 a(n) is the smallest integer k for which sigma_n(k) <= sigma_n(k-1) where sigma_n(k) = sum of the n-th powers of the divisors of k.

n	a(n)
0	3
1	5
2	7
3	25
4	61
5	145
6	361
7	853
8	1969
9	4489
10	10069
11	22273
12	48781
13	105949
14	228589
15	490405
16	1046977
17	2225965
18	4715401
19	9956977
20	20965213
21	44031361
22	92262349
23	192920785
24	402629257
25	838827577
26	1744784389
27	3623814865
28	7516104565

[3, 5, 7, 25, 61, 145, 361, 853, 1969, 4489, 10069, 22273, 48781, 105949, 228589, 490405, 1046977, 2225965, 4715401, 9956977, 20965213, 44031361, 92262349, 192920785, 402629257, 838827577, 1744784389, 3623814865, 7516104565]

cp's OEIS Frontend

A098475 a(n) is the smallest integer k for which sigma_n(k) <= sigma_n(k-1) where sigma_n(k) = sum of the n-th powers of the divisors of k.

Table of values

List of values