A283831 Take every fourth term of A104203.

1, -12, 3024, -4390848, 21224560896, -257991277243392, 6628234834692624384, -319729080846260095008768, 26571747463798134334265819136, -3564202847752289659513902717468672, 733070216072136922924207670741034860544, -221829664053602095461018886102097997267468288

Offset: 0

Author

N. J. A. Sloane, Mar 20 2017

Keywords

• sign

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..57

Crossrefs

Cf. A104203.

Programs

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

Extensions

a(9) - a(11) from Vincenzo Librandi, Mar 24 2017