A027993 - cp's OEIS frontend

A027993 a(n) = 1T(n,2n) + 2T(n,2n-1) + ... + (2n+1)*T(n,0), T given by A027926.

n	a(n)
0	1
1	6
2	20
3	54
4	132
5	306
6	688
7	1518
8	3308
9	7146
10	15336
11	32742
12	69604
13	147426
14	311264
15	655326
16	1376220
17	2883546
18	6029272
19	12582870
20	26214356
21	54525906
22	113246160
23	234880974
24	486539212
25	1006632906
26	2080374728
27	4294967238

[1, 6, 20, 54, 132, 306, 688, 1518, 3308, 7146, 15336, 32742, 69604, 147426, 311264, 655326, 1376220, 2883546, 6029272, 12582870, 26214356, 54525906, 113246160, 234880974, 486539212, 1006632906, 2080374728, 4294967238]

cp's OEIS Frontend

A027993 a(n) = 1T(n,2n) + 2T(n,2n-1) + ... + (2n+1)*T(n,0), T given by A027926.

Table of values

List of values

cp's OEIS Frontend

A027993 a(n) = 1*T(n,2n) + 2*T(n,2n-1) + ... + (2n+1)*T(n,0), T given by A027926.

Table of values

List of values

A027993 a(n) = 1T(n,2n) + 2T(n,2n-1) + ... + (2n+1)*T(n,0), T given by A027926.