A196126 - cp's OEIS frontend

A196126 Let A = {(x,y): x, y positive natural numbers and y <= x <= y^2}. a(n) is the cardinality of the subset {(x,y) in A such that x <= n}.

n	a(n)
1	1
2	2
3	4
4	7
5	10
6	14
7	19
8	25
9	32
10	39
11	47
12	56
13	66
14	77
15	89
16	102
17	115
18	129
19	144
20	160
21	177
22	195
23	214
24	234
25	255
26	276
27	298
28	321
29	345
30	370
31	396
32	423
33	451
34	480
35	510
36	541
37	572
38	604
39	637
40	671

[1, 2, 4, 7, 10, 14, 19, 25, 32, 39, 47, 56, 66, 77, 89, 102, 115, 129, 144, 160, 177, 195, 214, 234, 255, 276, 298, 321, 345, 370, 396, 423, 451, 480, 510, 541, 572, 604, 637, 671]

cp's OEIS Frontend

A196126 Let A = {(x,y): x, y positive natural numbers and y <= x <= y^2}. a(n) is the cardinality of the subset {(x,y) in A such that x <= n}.

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	7
5	10
6	14
7	19
8	25
9	32
10	39
11	47
12	56
13	66
14	77
15	89
16	102
17	115
18	129
19	144
20	160
21	177
22	195
23	214
24	234
25	255
26	276
27	298
28	321
29	345
30	370
31	396
32	423
33	451
34	480
35	510
36	541
37	572
38	604
39	637
40	671

n	a(n)
1	1
2	2
3	4
4	7
5	10
6	14
7	19
8	25
9	32
10	39
11	47
12	56
13	66
14	77
15	89
16	102
17	115
18	129
19	144
20	160
21	177
22	195
23	214
24	234
25	255
26	276
27	298
28	321
29	345
30	370
31	396
32	423
33	451
34	480
35	510
36	541
37	572
38	604
39	637
40	671

n	a(n)
1	1
2	2
3	4
4	7
5	10
6	14
7	19
8	25
9	32
10	39
11	47
12	56
13	66
14	77
15	89
16	102
17	115
18	129
19	144
20	160
21	177
22	195
23	214
24	234
25	255
26	276
27	298
28	321
29	345
30	370
31	396
32	423
33	451
34	480
35	510
36	541
37	572
38	604
39	637
40	671