A226390 - OEIS

%I #7 Sep 03 2022 22:58:52

%S 1,2,2,3,3,3,3,3,3,4,4,4,4,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,7,7,7,7,7,

%T 7,8,8,8,8,8,8,9,9,9,9,9,9,10,10,10,10,10,10,11,11,11,11,11,11,11,11,

%U 11,11,11,11,11,11,11,11,11,11,12,12,12,12,12

%N First differences of A014011.

%C a(A227388(n)) = n and a(m) < n for m < A227388(n).

%H Reinhard Zumkeller, <a href="/A226390/b226390.txt">Table of n, a(n) for n = 1..10000</a>

%o (Haskell)

%o a226390 n = a226390_list !! (n-1)

%o a226390_list = zipWith (-) (tail a014011_list) a014011_list

%Y Cf. A014011, A227389 (run lengths).

%K nonn

%O 1,2

%A _Reinhard Zumkeller_, Jul 10 2013