|
| |
|
|
A093986
|
|
a(1) = 1, a(2) = 1, a(n+1) = 2n*a(n) - a(n-1). Symmetrically a(n) = {a(n-1)+a(n+1)}/{(n-1) +(n+1)}.
|
|
2
| |
|
|
1, 1, 3, 17, 133, 1313, 15623, 217409, 3462921, 62115169, 1238840459, 27192374929, 651378157837, 16908639728833, 472790534249487, 14166807387755777, 452865045873935377, 15383244752326047041, 553343946037863758099
(list; graph; refs; listen; history; internal format)
|
| |
| |
|
|
