OFFSET
0,2
COMMENTS
LINKS
Harvey P. Dale, Table of n, a(n) for n = 0..324
FORMULA
MAPLE
with(combinat): seq(bell(n)*bell(n+1), n=0..19);
MATHEMATICA
Times@@@Partition[BellB[Range[0, 20]], 2, 1] (* Harvey P. Dale, Oct 07 2018 *)
PROG
(Magma) [&*[ Bell(n+k): k in [0..1] ]: n in [0..30]]; // Vincenzo Librandi, Apr 09 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
Emeric Deutsch and Paul D. Hanna, Nov 03 2006
STATUS
approved