A000346 - cp's OEIS frontend

A000346 a(n) = 2^(2n+1) - binomial(2n+1, n+1).

n	a(n)
0	1
1	5
2	22
3	93
4	386
5	1586
6	6476
7	26333
8	106762
9	431910
10	1744436
11	7036530
12	28354132
13	114159428
14	459312152
15	1846943453
16	7423131482
17	29822170718
18	119766321572
19	480832549478
20	1929894318332
21	7744043540348
22	31067656725032
23	124613686513778
24	499744650202436

[1, 5, 22, 93, 386, 1586, 6476, 26333, 106762, 431910, 1744436, 7036530, 28354132, 114159428, 459312152, 1846943453, 7423131482, 29822170718, 119766321572, 480832549478, 1929894318332, 7744043540348, 31067656725032, 124613686513778, 499744650202436]

cp's OEIS Frontend

A000346 a(n) = 2^(2n+1) - binomial(2n+1, n+1).

Table of values

List of values

cp's OEIS Frontend

A000346 a(n) = 2^(2*n+1) - binomial(2*n+1, n+1).

Table of values

List of values

A000346 a(n) = 2^(2n+1) - binomial(2n+1, n+1).