A211521 - cp's OEIS frontend

A211521 Number of ordered triples (w,x,y) with all terms in {1,...,n} and w + 2x = 4y.

n	a(n)
0	0
1	0
2	1
3	2
4	4
5	5
6	9
7	11
8	16
9	18
10	25
11	28
12	36
13	39
14	49
15	53
16	64
17	68
18	81
19	86
20	100
21	105
22	121
23	127
24	144
25	150
26	169
27	176
28	196
29	203
30	225
31	233
32	256
33	264
34	289
35	298
36	324
37	333
38	361
39	371
40	400
41	410
42	441
43	452
44	484
45	495
46	529
47	541
48	576
49	588
50	625
51	638
52	676
53	689
54	729
55	743

[0, 0, 1, 2, 4, 5, 9, 11, 16, 18, 25, 28, 36, 39, 49, 53, 64, 68, 81, 86, 100, 105, 121, 127, 144, 150, 169, 176, 196, 203, 225, 233, 256, 264, 289, 298, 324, 333, 361, 371, 400, 410, 441, 452, 484, 495, 529, 541, 576, 588, 625, 638, 676, 689, 729, 743]

cp's OEIS Frontend

A211521 Number of ordered triples (w,x,y) with all terms in {1,...,n} and w + 2x = 4y.

Table of values

List of values

n	a(n)
0	0
1	0
2	1
3	2
4	4
5	5
6	9
7	11
8	16
9	18
10	25
11	28
12	36
13	39
14	49
15	53
16	64
17	68
18	81
19	86
20	100
21	105
22	121
23	127
24	144
25	150
26	169
27	176
28	196
29	203
30	225
31	233
32	256
33	264
34	289
35	298
36	324
37	333
38	361
39	371
40	400
41	410
42	441
43	452
44	484
45	495
46	529
47	541
48	576
49	588
50	625
51	638
52	676
53	689
54	729
55	743

n	a(n)
0	0
1	0
2	1
3	2
4	4
5	5
6	9
7	11
8	16
9	18
10	25
11	28
12	36
13	39
14	49
15	53
16	64
17	68
18	81
19	86
20	100
21	105
22	121
23	127
24	144
25	150
26	169
27	176
28	196
29	203
30	225
31	233
32	256
33	264
34	289
35	298
36	324
37	333
38	361
39	371
40	400
41	410
42	441
43	452
44	484
45	495
46	529
47	541
48	576
49	588
50	625
51	638
52	676
53	689
54	729
55	743

n	a(n)
0	0
1	0
2	1
3	2
4	4
5	5
6	9
7	11
8	16
9	18
10	25
11	28
12	36
13	39
14	49
15	53
16	64
17	68
18	81
19	86
20	100
21	105
22	121
23	127
24	144
25	150
26	169
27	176
28	196
29	203
30	225
31	233
32	256
33	264
34	289
35	298
36	324
37	333
38	361
39	371
40	400
41	410
42	441
43	452
44	484
45	495
46	529
47	541
48	576
49	588
50	625
51	638
52	676
53	689
54	729
55	743