A088804 - cp's OEIS frontend

A088804 a(n) gives the number of steps taken in a process which manipulates piles of tokens arranged in a line. There are 2n (or 2n+1) tokens in all. Initially they are all in one pile. At each step, from each pile with more than 1 token, one token is taken and added to the pile on its left and one is taken and added to the pile on its right. The redistributions in each step are done in parallel.

n	a(n)
1	1
2	4
3	8
4	14
5	21
6	29
7	39
8	51
9	63
10	77
11	93
12	110
13	128
14	148
15	170
16	192
17	216
18	242
19	268
20	296
21	326
22	358
23	390
24	424
25	460
26	496
27	534
28	574
29	615
30	657
31	701
32	747
33	793
34	841
35	891
36	941
37	993
38	1047
39	1103
40	1159
41	1217
42	1277
43	1337
44	1399
45	1463
46	1529
47	1595
48	1663
49	1733
50	1803
51	1875
52	1949

[1, 4, 8, 14, 21, 29, 39, 51, 63, 77, 93, 110, 128, 148, 170, 192, 216, 242, 268, 296, 326, 358, 390, 424, 460, 496, 534, 574, 615, 657, 701, 747, 793, 841, 891, 941, 993, 1047, 1103, 1159, 1217, 1277, 1337, 1399, 1463, 1529, 1595, 1663, 1733, 1803, 1875, 1949]

cp's OEIS Frontend

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