A303567
a(n) = [x^n] ((Sum_{k=0..n} (k+1)!*x^k)/(Sum_{k=0..n} (k+1)!*(-x)^k))^(1/2).
Original entry on oeis.org
1, 2, 2, 16, 30, 492, 1052, 29632, 64582, 2842220, 6118860, 393285408, 831896748, 74023348728, 154261364376, 18199799667456, 37519687909062, 5669520927708492, 11601413537799692, 2184087758215537120, 4446590269784808388, 1020018234043912680104
Offset: 0
-
N=66; x='x+O('x^N); Vec((sum(k=0, N, (k+1)!*x^k)/sum(k=0, N, (k+1)!*(-x)^k))^(1/2))
A303569
a(n) = [x^n] ((Sum_{k=0..n} (k+7)!*x^k)/(Sum_{k=0..n} (k+7)!*(-x)^k))^(1/8).
Original entry on oeis.org
1, 2, 2, 80, 158, 9428, 21740, 1814144, 4326566, 480716188, 1138919436, 162673628256, 377710551084, 67537379669352, 153236971128120, 33578612305618176, 74565718435602822, 19669491236331371820, 42886189370197775372, 13410838610779209885664
Offset: 0
-
N=20; x='x+O('x^N); Vec((sum(k=0, N, (k+7)!*x^k)/sum(k=0, N, (k+7)!*(-x)^k))^(1/8))
A303613
a(n) = [x^n] (1/6 * Sum_{k=0..n} (k+3)!*x^k)^(1/2).
Original entry on oeis.org
1, 2, 8, 44, 300, 2408, 22056, 225824, 2547352, 31322640, 416442016, 5948450912, 90815006528, 1475513165184, 25419300628160, 462839142264960, 8882065110092000, 179190173518717120, 3791700201187720960, 83977684252758211200, 1942984028971973710720
Offset: 0
Showing 1-3 of 3 results.