A225525 - cp's OEIS frontend

A225525 a(n) = (sigma(2n) - sigma(n))Lucas(n) where Lucas(n) = A000204(n) and sigma(n) = A000203(n) is the sum of divisors of n.

n	a(n)
1	2
2	12
3	32
4	56
5	132
6	288
7	464
8	752
9	1976
10	2952
11	4776
12	10304
13	14588
14	26976
15	65472
16	70624
17	128556
18	300456
19	373960
20	726096
21	1566464
22	1900944
23	3075792
24	6635648
25	10401182
26	15200808
27	35136320
28	45481408
29	68991060
30	178607808
31	192662336
32	311734208
33	756594816
34	918147096
35	1980790944
36	3472069328

[2, 12, 32, 56, 132, 288, 464, 752, 1976, 2952, 4776, 10304, 14588, 26976, 65472, 70624, 128556, 300456, 373960, 726096, 1566464, 1900944, 3075792, 6635648, 10401182, 15200808, 35136320, 45481408, 68991060, 178607808, 192662336, 311734208, 756594816, 918147096, 1980790944, 3472069328]

cp's OEIS Frontend

A225525 a(n) = (sigma(2n) - sigma(n))Lucas(n) where Lucas(n) = A000204(n) and sigma(n) = A000203(n) is the sum of divisors of n.

Table of values

List of values

cp's OEIS Frontend

A225525 a(n) = (sigma(2*n) - sigma(n))*Lucas(n) where Lucas(n) = A000204(n) and sigma(n) = A000203(n) is the sum of divisors of n.

Table of values

List of values

A225525 a(n) = (sigma(2n) - sigma(n))Lucas(n) where Lucas(n) = A000204(n) and sigma(n) = A000203(n) is the sum of divisors of n.