The OEIS is supported by the many generous donors to the OEIS Foundation.
A151286 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 6 |
| 3 | 20 |
| 4 | 70 |
| 5 | 260 |
| 6 | 986 |
| 7 | 3852 |
| 8 | 15284 |
| 9 | 61646 |
| 10 | 251636 |
| 11 | 1038026 |
| 12 | 4320900 |
| 13 | 18123780 |
| 14 | 76544604 |
| 15 | 325197844 |
| 16 | 1389044326 |
| 17 | 5961411840 |
| 18 | 25695687106 |
| 19 | 111190743966 |
| 20 | 482866090476 |
| 21 | 2103799954064 |
| 22 | 9193627059292 |
| 23 | 40287920890732 |
| 24 | 177002193428102 |
| 25 | 779506763324538 |
| 26 | 3440547333117048 |
| 27 | 15217327587907986 |
[1,2,6,20,70,260,986,3852,15284,61646,251636, 1038026,4320900,18123780,76544604,325197844, 1389044326,5961411840,25695687106,111190743966, 482866090476,2103799954064,9193627059292, 40287920890732,177002193428102,779506763324538, 3440547333117048,15217327587907986] |