A283831 - OEIS

%I #8 Mar 24 2017 06:48:08

%S 1,-12,3024,-4390848,21224560896,-257991277243392,6628234834692624384,

%T -319729080846260095008768,26571747463798134334265819136,

%U -3564202847752289659513902717468672,733070216072136922924207670741034860544,-221829664053602095461018886102097997267468288

%N Take every fourth term of A104203.

%H Vincenzo Librandi, <a href="/A283831/b283831.txt">Table of n, a(n) for n = 0..57</a>

%o (PARI) x='x+O('x^66); v=Vec(serlaplace(serreverse( intformal( 1/sqrt(1-x^4))))); vector(#v\4,n,v[4*n-3]) \\ _Joerg Arndt_, Mar 24 2017

%Y Cf. A104203.

%K sign

%O 0,2

%A _N. J. A. Sloane_, Mar 20 2017

%E a(9) - a(11) from _Vincenzo Librandi_, Mar 24 2017