A284722 (2n+1-A284721(n))/2.

-1, -1, 1, 2, 2, 4, 5, 4, 7, 8, 8, 10, 11, 11, 13, 14, 14, 16, 17, 17, 19, 20, 19, 22, 23, 23, 25, 26, 26, 28, 29, 29, 31, 32, 32, 34, 35, 34, 37, 38, 38, 40, 41, 41, 43, 44, 44, 46, 47, 47, 49, 50, 47, 52, 53, 53, 55, 56, 56, 58, 59, 59, 61, 62, 62, 64, 65, 64, 67, 68, 68, 70, 71, 71, 73, 74, 74

Offset: 0

Author

N. J. A. Sloane, Apr 04 2017

Keywords

• sign

Crossrefs

Cf. A284721.