A237347 First differences of A078633.

3, 3, 2, 3, 2, 3, 2, 2, 3, 2, 2, 3, 2, 2, 2, 3, 2, 2, 2, 3, 2, 2, 2, 2, 3, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2

Offset: 1

Author

Reinhard Zumkeller, Mar 18 2014

Keywords

• nonn

Comments

a(n) = A078633(n+1) - A078633(n);

2 <= a(n) <= 3;

a(A049068(n)) = 2; a(A002620(n)) = 3;

A237347(n) = abs(A167752(n)) + 2.

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Programs

Haskell

a237347 n = a237347_list !! (n-1)
a237347_list = zipWith (-) (tail a078633_list) a078633_list