OFFSET
1,1
COMMENTS
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..96
EXAMPLE
a(40) = 2468 with constant digit differences = +2;
a(41) = 3210 with constant digit differences = -1;
a(42) = 3456 with constant digit differences = +1.
PROG
(Haskell)
a247616 n = a247616_list !! (n-1)
a247616_list = filter f [100 .. 9876543210] where
f x = head vs /= 0 && all (== 0) ws where
ws = zipWith (-) (tail vs) vs
vs = zipWith (-) (tail us) us
us = map (read . return) $ show x
CROSSREFS
KEYWORD
nonn,base,fini,full
AUTHOR
Reinhard Zumkeller, Sep 21 2014
STATUS
approved