A256541 First differences of A166133.

1, 2, -1, 5, -1, -1, -1, 7, -1, -1, -1, 7, -1, -1, -1, 8, -1, -1, -1, -1, 7, -1, -1, 47, -41, -1, -1, -1, 14, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 133, -121, -1, -1

Offset

1,2

Comments

a(n) != 0; abs(a(A256543(n))) = 1.

Links

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

Prog

(Haskell)
a256541 n = a256541_list !! (n-1)
a256541_list = zipWith (-) (tail a166133_list) a166133_list

Crossrefs

Cf. A166133, A256543.

Sequence in context: A369865 A175178 A348494 * A342919 A066421 A369526

Adjacent sequences: A256538 A256539 A256540 * A256542 A256543 A256544

Keyword

sign

Author

Reinhard Zumkeller, Apr 01 2015

Status

approved