A209443 - cp's OEIS frontend

A209443 a(n) = Pell(n)*A000118(n) for n>=1 with a(0)=1, where A000118(n) is the number of ways of writing n as a sum of 4 squares.

n	a(n)
0	1
1	8
2	48
3	160
4	288
5	1392
6	6720
7	10816
8	9792
9	102440
10	342432
11	551136
12	1330560
13	3747632
14	15510144
15	37444800
16	11299968
17	163683216
18	856193520
19	1060017440
20	2303197632
21	9885175040
22	26848039104
23	43211266752
24	52160613120
25	325311054008
26	1064050163232
27	2446518414400

[1, 8, 48, 160, 288, 1392, 6720, 10816, 9792, 102440, 342432, 551136, 1330560, 3747632, 15510144, 37444800, 11299968, 163683216, 856193520, 1060017440, 2303197632, 9885175040, 26848039104, 43211266752, 52160613120, 325311054008, 1064050163232, 2446518414400]

cp's OEIS Frontend

A209443 a(n) = Pell(n)*A000118(n) for n>=1 with a(0)=1, where A000118(n) is the number of ways of writing n as a sum of 4 squares.

Table of values

List of values