A209445 - cp's OEIS frontend

A209445 a(n) = Pell(n)*A001227(n) for n >= 1, where A001227(n) is the number of odd divisors of n.

n	a(n)
1	1
2	2
3	10
4	12
5	58
6	140
7	338
8	408
9	2955
10	4756
11	11482
12	27720
13	66922
14	161564
15	780100
16	470832
17	2273378
18	8232630
19	13250218
20	31988856
21	154455860
22	186444716
23	450117362
24	1086679440
25	3935214363
26	6333631924
27	30581480180
28	36915112104
29	89120964298
30	430314081400
31	519435045698

[1, 2, 10, 12, 58, 140, 338, 408, 2955, 4756, 11482, 27720, 66922, 161564, 780100, 470832, 2273378, 8232630, 13250218, 31988856, 154455860, 186444716, 450117362, 1086679440, 3935214363, 6333631924, 30581480180, 36915112104, 89120964298, 430314081400, 519435045698]

cp's OEIS Frontend

A209445 a(n) = Pell(n)*A001227(n) for n >= 1, where A001227(n) is the number of odd divisors of n.

Table of values

List of values