A209451 - cp's OEIS frontend

A209451 a(n) = Pell(n)A034896(n) for n >= 1, with a(0)=1, where A034896 lists the number of solutions to a^2 + b^2 + 3c^2 + 3*d^2 = n.

n	a(n)
0	1
1	4
2	8
3	20
4	240
5	696
6	280
7	5408
8	21216
9	3940
10	57072
11	275568
12	277200
13	1873816
14	2585024
15	4680600
16	54616512
17	81841608
18	10976840
19	530008720
20	1919331360
21	1235646880
22	4474673184
23	21605633376
24	28253665440
25	162655527004
26	177341693872
27	30581480180
28	2953208968320

[1, 4, 8, 20, 240, 696, 280, 5408, 21216, 3940, 57072, 275568, 277200, 1873816, 2585024, 4680600, 54616512, 81841608, 10976840, 530008720, 1919331360, 1235646880, 4474673184, 21605633376, 28253665440, 162655527004, 177341693872, 30581480180, 2953208968320]

cp's OEIS Frontend

A209451 a(n) = Pell(n)A034896(n) for n >= 1, with a(0)=1, where A034896 lists the number of solutions to a^2 + b^2 + 3c^2 + 3*d^2 = n.

Table of values

List of values

cp's OEIS Frontend

A209451 a(n) = Pell(n)*A034896(n) for n >= 1, with a(0)=1, where A034896 lists the number of solutions to a^2 + b^2 + 3*c^2 + 3*d^2 = n.

Table of values

List of values

A209451 a(n) = Pell(n)A034896(n) for n >= 1, with a(0)=1, where A034896 lists the number of solutions to a^2 + b^2 + 3c^2 + 3*d^2 = n.