OFFSET
0,1
FORMULA
MATHEMATICA
Differences[#, 2] &@ Array[Binomial[2 #, #] &, 29, 0] (* Michael De Vlieger, Nov 15 2019 *)
PROG
(PARI) C=vector(30, n, binomial(2*n--, n)); C=C[^1]-C[^-1]; C=C[^1]-C[^-1]
CROSSREFS
KEYWORD
nonn
AUTHOR
M. F. Hasler, Nov 15 2019
STATUS
approved