0,1

Also fourth differences of (A057979 with (4n+3)-th terms negative = 1, n, -1, n+1). Also 8*(without 0, A004525 signed).

First differences: -1, -1, 2, 0, 1, -3, 4, -2, 3, -5, 6, -4, 5, -7, 8, -6, 7, -9 ...; second: 0, 3, -2, 1, -4, 7, -6, 5, -8, 11, -10, 9, -12 ... (cf. A092486); third: 3, -5, 3, -5, 11, -13, 11, -13, 19, -21, 19, -21, 27, -29, 27, -29, ... for which d(2n)+d(2n+1)=-A007395.

Sequence in context: A088841 A145446 A023415 this_sequence A136050 A077106 A121309

Adjacent sequences: A134311 A134312 A134313 this_sequence A134315 A134316 A134317

sign,easy,more

Paul Curtz (bpcrtz(AT)free.fr), Jan 30 2008

Edited by njas, Mar 23 2008