A151910 First differences of A001682.

21, 21, 23, 21, 23, 21, 21, 23, 21, 23, 21, 23, 21, 21, 23, 21, 23, 21, 23, 21, 21, 23, 21, 23, 21, 23, 21, 21, 23, 21, 23, 21, 23, 21, 21, 23, 21, 23, 21, 23, 21, 21, 23, 21, 23, 21, 23, 21, 21, 23, 21, 23, 21, 23, 21, 21, 23

Offset: 1

Author

Harvey P. Dale, Aug 08 2009

Keywords

• nonn

Comments

a(n) = A001682(n+1) - A001682(n).

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..1000

Programs

Haskell

a151910 n = a151910_list !! (n-1)
a151910_list = zipWith (-) (tail a001682_list) a001682_list
-- Reinhard Zumkeller, Oct 10 2011

Extensions

Offset corrected and initial term added by Reinhard Zumkeller, Oct 10 2011