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A278072
Riordan array(1/(1+x), (1-sqrt(1-4*x))/(2*x)).
0
1, -1, 1, 1, 1, 1, -1, 4, 3, 1, 1, 10, 11, 5, 1, -1, 32, 37, 22, 7, 1, 1, 100, 128, 88, 37, 9, 1, -1, 329, 444, 341, 171, 56, 11, 1, 1, 1101, 1558, 1297, 739, 294, 79, 13, 1, -1, 3761, 5514, 4891, 3069, 1406, 465, 106, 15, 1, 1, 13035, 19680, 18365, 12435, 6346, 2442, 692, 137, 17, 1
OFFSET
0,8
EXAMPLE
[ 1]
[ -1, 1]
[ 1, 1, 1]
[ -1, 4, 3, 1]
[ 1, 10, 11, 5, 1]
[ -1, 32, 37, 22, 7, 1]
[ 1, 100, 128, 88, 37, 9, 1]
[ -1, 329, 444, 341, 171, 56, 11, 1]
MATHEMATICA
(* The function RiordanArray is defined in A256893. *)
RiordanArray[1/(1+#)&, (1-Sqrt[1-4#])/(2#)&, 11] // Flatten (* Jean-François Alcover, Jul 16 2019 *)
PROG
(Sage) # uses[riordan_array from A256893]
riordan_array(1/(1+x), (1-sqrt(1-4*x))/(2*x), 8)
CROSSREFS
Sequence in context: A046546 A189967 A139623 * A358710 A216482 A080758
KEYWORD
sign,tabl
AUTHOR
Peter Luschny, Nov 22 2016
STATUS
approved