A259013 - cp's OEIS frontend

A259013 a(n) is the smallest number of grains of sand placed at the center square of a (2n-1) X (2n-1) table so that some grains drop off the table by the end of the diffusion process.

n	a(n)
1	4
2	16
3	44
4	88
5	144
6	208
7	320
8	408
9	512
10	672
11	788
12	948
13	1096
14	1288
15	1552
16	1768
17	1960
18	2208
19	2456
20	2708
21	3028
22	3384
23	3648
24	3964
25	4348
26	4728
27	5076
28	5448
29	5884
30	6308
31	6708
32	7176
33	7644
34	8240
35	8664
36	9132
37	9764
38	10276
39	10816
40	11404
41	11992
42	12516
43	13264
44	13816
45	14388

[4, 16, 44, 88, 144, 208, 320, 408, 512, 672, 788, 948, 1096, 1288, 1552, 1768, 1960, 2208, 2456, 2708, 3028, 3384, 3648, 3964, 4348, 4728, 5076, 5448, 5884, 6308, 6708, 7176, 7644, 8240, 8664, 9132, 9764, 10276, 10816, 11404, 11992, 12516, 13264, 13816, 14388]

cp's OEIS Frontend

A259013 a(n) is the smallest number of grains of sand placed at the center square of a (2n-1) X (2n-1) table so that some grains drop off the table by the end of the diffusion process.

Table of values

List of values