A352226 - cp's OEIS frontend

A352226 Consider a 2D sandpile model where each site with 2 or more grains, say at location (x, y), topples and transfers one grain of sand to the sites at locations (x+1, y) and (x, y+1). Let S(n) be the configuration after stabilization of a configuration with n grains at the origin. a(n) = Max_{ (x,y) in S(n) } (x+y).

n	a(n)
1	0
2	1
3	1
4	3
5	3
6	3
7	3
8	5
9	5
10	5
11	5
12	7
13	7
14	7
15	7
16	9
17	9
18	9
19	9
20	9
21	9
22	9
23	9
24	11
25	11
26	11
27	11
28	13
29	13
30	13
31	13
32	15
33	15
34	15
35	15
36	15
37	15
38	15
39	15
40	15
41	15
42	15
43	15
44	17
45	17
46	17
47	17
48	19
49	19
50	19
51	19
52	19
53	19
54	19
55	19
56	19
57	19
58	19
59	19
60	21
61	21
62	21
63	21
64	23
65	23
66	23
67	23
68	23
69	23
70	23
71	23

[0, 1, 1, 3, 3, 3, 3, 5, 5, 5, 5, 7, 7, 7, 7, 9, 9, 9, 9, 9, 9, 9, 9, 11, 11, 11, 11, 13, 13, 13, 13, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 17, 17, 17, 17, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 21, 21, 21, 21, 23, 23, 23, 23, 23, 23, 23, 23]

cp's OEIS Frontend

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	3
5	3
6	3
7	3
8	5
9	5
10	5
11	5
12	7
13	7
14	7
15	7
16	9
17	9
18	9
19	9
20	9
21	9
22	9
23	9
24	11
25	11
26	11
27	11
28	13
29	13
30	13
31	13
32	15
33	15
34	15
35	15
36	15
37	15
38	15
39	15
40	15
41	15
42	15
43	15
44	17
45	17
46	17
47	17
48	19
49	19
50	19
51	19
52	19
53	19
54	19
55	19
56	19
57	19
58	19
59	19
60	21
61	21
62	21
63	21
64	23
65	23
66	23
67	23
68	23
69	23
70	23
71	23

n	a(n)
1	0
2	1
3	1
4	3
5	3
6	3
7	3
8	5
9	5
10	5
11	5
12	7
13	7
14	7
15	7
16	9
17	9
18	9
19	9
20	9
21	9
22	9
23	9
24	11
25	11
26	11
27	11
28	13
29	13
30	13
31	13
32	15
33	15
34	15
35	15
36	15
37	15
38	15
39	15
40	15
41	15
42	15
43	15
44	17
45	17
46	17
47	17
48	19
49	19
50	19
51	19
52	19
53	19
54	19
55	19
56	19
57	19
58	19
59	19
60	21
61	21
62	21
63	21
64	23
65	23
66	23
67	23
68	23
69	23
70	23
71	23

n	a(n)
1	0
2	1
3	1
4	3
5	3
6	3
7	3
8	5
9	5
10	5
11	5
12	7
13	7
14	7
15	7
16	9
17	9
18	9
19	9
20	9
21	9
22	9
23	9
24	11
25	11
26	11
27	11
28	13
29	13
30	13
31	13
32	15
33	15
34	15
35	15
36	15
37	15
38	15
39	15
40	15
41	15
42	15
43	15
44	17
45	17
46	17
47	17
48	19
49	19
50	19
51	19
52	19
53	19
54	19
55	19
56	19
57	19
58	19
59	19
60	21
61	21
62	21
63	21
64	23
65	23
66	23
67	23
68	23
69	23
70	23
71	23