A241418 First differences of Arshon's sequence, cf. A099054.

1, 1, -2, 2, -1, 1, -2, 1, 1, -1, -1, 2, -2, 1, -1, 2, -1, 1, -2, 1, 1, -1, -1, 1, 1, -2, 1, -1, 2, -1, 1, -2, 2, -1, -1, 2, -2, 1, 1, -1, -1, 1, 1, -2, 2, -1, -1, 2, -2, 1, -1, 2, -1, 1, -2, 1, 1, -1, -1, 1, 1, -2, 1, -1, 2, -1, 1, -2, 2, -1, -1, 1, 1, -2

Offset: 0

Author

Reinhard Zumkeller, Aug 08 2014

Keywords

• sign

Comments

Also first differences of A219762;

a(n) = A099054(n+1) - A099054(n) = A219762(n+2) - A219762(n+1).

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

Crossrefs

Cf. A099054, A219762.

Programs

Haskell

a241418 n = a241418_list !! n
a241418_list = zipWith (-) (tail a099054_list) a099054_list