OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..57
PROG
(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
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Mar 20 2017
EXTENSIONS
a(9) - a(11) from Vincenzo Librandi, Mar 24 2017
STATUS
approved