A363763 - cp's OEIS frontend

A363763 a(n) is the least k such that there are exactly n distinct numbers j that can be expressed as the sum of two squares with k^2 < j < (k+1)^2, or -1 if such a k does not exist.

n	a(n)
0	0
1	1
2	2
3	4
4	5
5	7
6	8
7	10
8	13
9	12
10	15
11	17
12	19
13	23
14	21
15	24
16	25
17	28
18	32
19	31
20	34
21	37
22	39
23	44
24	41
25	43
26	45
27	50
28	51
29	48
30	57
31	55
32	56
33	59
34	64
35	63
36	68
37	69
38	74
39	77
40	78
41	75
42	72
43	80
44	88
45	84
46	-1
47	94
48	89
49	96
50	93
51	99
52	97
53	102
54	108
55	-1
56	106
57	111
58	110
59	113
60	117
61	120
62	-1
63	123
64	133
65	127
66	130
67	137
68	142
69	138
70	139
71	-1
72	135

[0, 1, 2, 4, 5, 7, 8, 10, 13, 12, 15, 17, 19, 23, 21, 24, 25, 28, 32, 31, 34, 37, 39, 44, 41, 43, 45, 50, 51, 48, 57, 55, 56, 59, 64, 63, 68, 69, 74, 77, 78, 75, 72, 80, 88, 84, -1, 94, 89, 96, 93, 99, 97, 102, 108, -1, 106, 111, 110, 113, 117, 120, -1, 123, 133, 127, 130, 137, 142, 138, 139, -1, 135]

cp's OEIS Frontend

A363763 a(n) is the least k such that there are exactly n distinct numbers j that can be expressed as the sum of two squares with k^2 < j < (k+1)^2, or -1 if such a k does not exist.

Table of values

List of values

n	a(n)
0	0
1	1
2	2
3	4
4	5
5	7
6	8
7	10
8	13
9	12
10	15
11	17
12	19
13	23
14	21
15	24
16	25
17	28
18	32
19	31
20	34
21	37
22	39
23	44
24	41
25	43
26	45
27	50
28	51
29	48
30	57
31	55
32	56
33	59
34	64
35	63
36	68
37	69
38	74
39	77
40	78
41	75
42	72
43	80
44	88
45	84
46	-1
47	94
48	89
49	96
50	93
51	99
52	97
53	102
54	108
55	-1
56	106
57	111
58	110
59	113
60	117
61	120
62	-1
63	123
64	133
65	127
66	130
67	137
68	142
69	138
70	139
71	-1
72	135

n	a(n)
0	0
1	1
2	2
3	4
4	5
5	7
6	8
7	10
8	13
9	12
10	15
11	17
12	19
13	23
14	21
15	24
16	25
17	28
18	32
19	31
20	34
21	37
22	39
23	44
24	41
25	43
26	45
27	50
28	51
29	48
30	57
31	55
32	56
33	59
34	64
35	63
36	68
37	69
38	74
39	77
40	78
41	75
42	72
43	80
44	88
45	84
46	-1
47	94
48	89
49	96
50	93
51	99
52	97
53	102
54	108
55	-1
56	106
57	111
58	110
59	113
60	117
61	120
62	-1
63	123
64	133
65	127
66	130
67	137
68	142
69	138
70	139
71	-1
72	135

n	a(n)
0	0
1	1
2	2
3	4
4	5
5	7
6	8
7	10
8	13
9	12
10	15
11	17
12	19
13	23
14	21
15	24
16	25
17	28
18	32
19	31
20	34
21	37
22	39
23	44
24	41
25	43
26	45
27	50
28	51
29	48
30	57
31	55
32	56
33	59
34	64
35	63
36	68
37	69
38	74
39	77
40	78
41	75
42	72
43	80
44	88
45	84
46	-1
47	94
48	89
49	96
50	93
51	99
52	97
53	102
54	108
55	-1
56	106
57	111
58	110
59	113
60	117
61	120
62	-1
63	123
64	133
65	127
66	130
67	137
68	142
69	138
70	139
71	-1
72	135