A351837 - cp's OEIS frontend

A351837 Consider a variant of the toothpick sequence (A139250) where each new toothpick, except the first, touches exactly one existing toothpick at the ends, this one being in the prior stage; a(n) is the total number of toothpicks at stage n.

n	a(n)
0	0
1	1
2	5
3	9
4	17
5	25
6	37
7	53
8	69
9	77
10	89
11	109
12	133
13	161
14	201
15	249
16	281
17	289
18	301
19	321
20	345
21	373
22	413
23	465
24	505
25	533
26	577
27	641
28	717
29	813
30	941
31	1069
32	1133
33	1141
34	1153
35	1173
36	1197
37	1225
38	1265
39	1317
40	1357
41	1385
42	1429
43	1493
44	1569
45	1665
46	1793
47	1925
48	1997
49	2025
50	2069

[0, 1, 5, 9, 17, 25, 37, 53, 69, 77, 89, 109, 133, 161, 201, 249, 281, 289, 301, 321, 345, 373, 413, 465, 505, 533, 577, 641, 717, 813, 941, 1069, 1133, 1141, 1153, 1173, 1197, 1225, 1265, 1317, 1357, 1385, 1429, 1493, 1569, 1665, 1793, 1925, 1997, 2025, 2069]

cp's OEIS Frontend

A351837 Consider a variant of the toothpick sequence (A139250) where each new toothpick, except the first, touches exactly one existing toothpick at the ends, this one being in the prior stage; a(n) is the total number of toothpicks at stage n.

Table of values

List of values