A366415 - cp's OEIS frontend

A366415 a(n) is the number of exterior top arches (no covering arch) for semi-meanders in generation n+1 that are generated by semi-meanders with n top arches and floor(n/2) exterior top arches using the exterior arch splitting algorithm.

n	a(n)
4	10
5	34
6	78
7	222
8	362
9	938
10	1326
11	3246
12	4242
13	10002
14	12438
15	28566
16	34330
17	77338
18	90654
19	201246
20	231458
21	507938
22	575526
23	1251366
24	1400874
25	3022890
26	3350574
27	7184430
28	7897138
29	16842802
30	18382902
31	39026742
32	42336314
33	89522234
34	96600126
35	203554878

[10, 34, 78, 222, 362, 938, 1326, 3246, 4242, 10002, 12438, 28566, 34330, 77338, 90654, 201246, 231458, 507938, 575526, 1251366, 1400874, 3022890, 3350574, 7184430, 7897138, 16842802, 18382902, 39026742, 42336314, 89522234, 96600126, 203554878]

cp's OEIS Frontend

A366415 a(n) is the number of exterior top arches (no covering arch) for semi-meanders in generation n+1 that are generated by semi-meanders with n top arches and floor(n/2) exterior top arches using the exterior arch splitting algorithm.

Table of values

List of values