A211423 - cp's OEIS frontend

A211423 Number of ordered triples (w,x,y) with all terms in {-n,...,0,...,n} and w^2 + 2xy = 0.

n	a(n)
0	1
1	5
2	17
3	21
4	33
5	37
6	49
7	53
8	73
9	85
10	97
11	101
12	121
13	125
14	137
15	141
16	161
17	165
18	193
19	197
20	209
21	213
22	225
23	229
24	257
25	277
26	289
27	301
28	313
29	317
30	337
31	341
32	377
33	381
34	393
35	397
36	433
37	437
38	449
39	453
40	481
41	485
42	497
43	501
44	513
45	525
46	537
47	541
48	569
49	597
50	641
51	645
52	657

[1, 5, 17, 21, 33, 37, 49, 53, 73, 85, 97, 101, 121, 125, 137, 141, 161, 165, 193, 197, 209, 213, 225, 229, 257, 277, 289, 301, 313, 317, 337, 341, 377, 381, 393, 397, 433, 437, 449, 453, 481, 485, 497, 501, 513, 525, 537, 541, 569, 597, 641, 645, 657]

cp's OEIS Frontend

A211423 Number of ordered triples (w,x,y) with all terms in {-n,...,0,...,n} and w^2 + 2xy = 0.

Table of values

List of values

n	a(n)
0	1
1	5
2	17
3	21
4	33
5	37
6	49
7	53
8	73
9	85
10	97
11	101
12	121
13	125
14	137
15	141
16	161
17	165
18	193
19	197
20	209
21	213
22	225
23	229
24	257
25	277
26	289
27	301
28	313
29	317
30	337
31	341
32	377
33	381
34	393
35	397
36	433
37	437
38	449
39	453
40	481
41	485
42	497
43	501
44	513
45	525
46	537
47	541
48	569
49	597
50	641
51	645
52	657

n	a(n)
0	1
1	5
2	17
3	21
4	33
5	37
6	49
7	53
8	73
9	85
10	97
11	101
12	121
13	125
14	137
15	141
16	161
17	165
18	193
19	197
20	209
21	213
22	225
23	229
24	257
25	277
26	289
27	301
28	313
29	317
30	337
31	341
32	377
33	381
34	393
35	397
36	433
37	437
38	449
39	453
40	481
41	485
42	497
43	501
44	513
45	525
46	537
47	541
48	569
49	597
50	641
51	645
52	657

cp's OEIS Frontend

A211423 Number of ordered triples (w,x,y) with all terms in {-n,...,0,...,n} and w^2 + 2*x*y = 0.

Table of values

List of values

A211423 Number of ordered triples (w,x,y) with all terms in {-n,...,0,...,n} and w^2 + 2xy = 0.

n	a(n)
0	1
1	5
2	17
3	21
4	33
5	37
6	49
7	53
8	73
9	85
10	97
11	101
12	121
13	125
14	137
15	141
16	161
17	165
18	193
19	197
20	209
21	213
22	225
23	229
24	257
25	277
26	289
27	301
28	313
29	317
30	337
31	341
32	377
33	381
34	393
35	397
36	433
37	437
38	449
39	453
40	481
41	485
42	497
43	501
44	513
45	525
46	537
47	541
48	569
49	597
50	641
51	645
52	657