OFFSET
0,2
LINKS
Robert Israel, Table of n, a(n) for n = 0..10000
FORMULA
G.f.: (1-x)^(-1)*Sum_{n>=0} (z^(2*n^2+n+1) + z^(2*n^2+3*n+1)). - Robert Israel, Jun 03 2019
MAPLE
seq(op([(2*n)$(2*n+1), (2*n+1)$(2*n)]), n=0..14); # Robert Israel, Jun 03 2019
MATHEMATICA
Table[{PadRight[{}, 2n+1, 2n], PadRight[{}, 2n, 2n+1]}, {n, 0, 10}]//Flatten (* Harvey P. Dale, Aug 01 2017 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul Curtz, Jul 22 2007
STATUS
approved