A274688 First differences of A274687.

-2, 3, -5, 7, -8, 9, -11, 12, -13, 15, -17, 19, -20, 21, -23, 25, -27, 28, -29, 31, -32, 33, -35, 36, -37, 39, -41, 43, -44, 45, -47, 48, -49, 51, -52, 53, -55, 57, -59, 60, -61, 63, -65, 67, -68, 69, -71, 73, -75, 76, -77, 79, -80, 81, -83, 84, -85, 87, -89

Offset: 1

Author

Max Barrentine, Jul 02 2016

Keywords

• sign

Comments

This sequence and its partial sums plus one list every integer except zero.

Crossrefs

Cf. A030124, A053661, A274687.

Formula

If n is even, a(n) = A053661(n+1); if n is odd, a(n) = -A053661(n+1)