A203414 - cp's OEIS frontend

A203414 a(n) = nPell(n) Sum_{d|n} 1/(d*Pell(d)) where Pell(n) = A000129(n).

n	a(n)
1	1
2	5
3	16
4	61
5	146
6	554
7	1184
8	4149
9	9457
10	29890
11	63152
12	222850
13	434994
14	1414642
15	3140576
16	9575893
17	19323714
18	65160959
19	125877072
20	408744626
21	865638272
22	2563647322
23	5176349664
24	17476326546
25	33019614771
26	102921708050
27	220209942688
28	657218691722
29	1292253982322

[1, 5, 16, 61, 146, 554, 1184, 4149, 9457, 29890, 63152, 222850, 434994, 1414642, 3140576, 9575893, 19323714, 65160959, 125877072, 408744626, 865638272, 2563647322, 5176349664, 17476326546, 33019614771, 102921708050, 220209942688, 657218691722, 1292253982322]

cp's OEIS Frontend

A203414 a(n) = nPell(n) Sum_{d|n} 1/(d*Pell(d)) where Pell(n) = A000129(n).

Table of values

List of values

cp's OEIS Frontend

A203414 a(n) = n*Pell(n) * Sum_{d|n} 1/(d*Pell(d)) where Pell(n) = A000129(n).

Table of values

List of values

A203414 a(n) = nPell(n) Sum_{d|n} 1/(d*Pell(d)) where Pell(n) = A000129(n).