A352681 - cp's OEIS frontend

A352681 a(n) = [x^n] (3x + 1)(1 - sqrt(1 - 4x))/(2x).

n	a(n)
0	1
1	4
2	5
3	11
4	29
5	84
6	258
7	825
8	2717
9	9152
10	31382
11	109174
12	384370
13	1366936
14	4903140
15	17718165
16	64442205
17	235717800
18	866573070
19	3200179290
20	11865909990
21	44158628280
22	164881364700
23	617507304570
24	2319082988274
25	8731658843424
26	32953192276508
27	124635610132460

[1, 4, 5, 11, 29, 84, 258, 825, 2717, 9152, 31382, 109174, 384370, 1366936, 4903140, 17718165, 64442205, 235717800, 866573070, 3200179290, 11865909990, 44158628280, 164881364700, 617507304570, 2319082988274, 8731658843424, 32953192276508, 124635610132460]

cp's OEIS Frontend

A352681 a(n) = [x^n] (3x + 1)(1 - sqrt(1 - 4x))/(2x).

Table of values

List of values

cp's OEIS Frontend

A352681 a(n) = [x^n] (3*x + 1)*(1 - sqrt(1 - 4*x))/(2*x).

Table of values

List of values

A352681 a(n) = [x^n] (3x + 1)(1 - sqrt(1 - 4x))/(2x).