OFFSET
1,2
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
MATHEMATICA
Table[GCD[CatalanNumber[n], BellB[n]], {n, 1, 84}] (* Amiram Eldar, Nov 23 2019 *)
PROG
(Python)
from itertools import count, accumulate, islice
def A091772_gen(): # generator of terms
yield 1
blist, b, c = (1, 2), 1, 1
for n in count(1):
blist = list(accumulate(blist, initial=(b:=blist[-1])))
yield gcd(b, c := c*(4*n+2)//(n+2))
CROSSREFS
KEYWORD
nonn
AUTHOR
Jon Perry, Mar 06 2004
STATUS
approved