A136421 - cp's OEIS frontend

A136421 a(n) = floor((x^n - (1-x)^n)/sqrt(2)+ 1/2) where x = (sqrt(2)+1)/2.

n	a(n)
1	1
2	1
3	1
4	2
5	2
6	2
7	3
8	3
9	4
10	5
11	6
12	7
13	8
14	10
15	12
16	14
17	17
18	21
19	25
20	31
21	37
22	44
23	54
24	65
25	78
26	94
27	114
28	138
29	166
30	200
31	242
32	292
33	352
34	425
35	514
36	620
37	748
38	903
39	1090
40	1316
41	1589
42	1918
43	2315
44	2794
45	3373
46	4072
47	4915
48	5933
49	7162
50	8645
51	10436
52	12597
53	15206
54	18355
55	22156
56	26745

[1, 1, 1, 2, 2, 2, 3, 3, 4, 5, 6, 7, 8, 10, 12, 14, 17, 21, 25, 31, 37, 44, 54, 65, 78, 94, 114, 138, 166, 200, 242, 292, 352, 425, 514, 620, 748, 903, 1090, 1316, 1589, 1918, 2315, 2794, 3373, 4072, 4915, 5933, 7162, 8645, 10436, 12597, 15206, 18355, 22156, 26745]

cp's OEIS Frontend

A136421 a(n) = floor((x^n - (1-x)^n)/sqrt(2)+ 1/2) where x = (sqrt(2)+1)/2.

Table of values

List of values