A170878 First differences of A072272.

4, 0, 12, -12, 20, -8, 44, -56, 20, 0, 60, -68, 68, -24, 156, -212, 20, 0, 60, -60, 100, -40, 220, -288, 68, 0, 204, -228, 244, -88, 556, -768, 20, 0, 60, -60, 100, -40, 220, -280, 100, 0, 300, -340, 340, -120, 780, -1068, 68, 0, 204, -204, 340, -136, 748, -976, 244, 0, 732, -820, 868, -312, 1980, -2748

Offset: 0

Author

N. J. A. Sloane, Jan 07 2010, Apr 17 2010

Keywords

• sign

Links

• David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata, Congressus Numerantium, Vol. 206 (2010), 157-191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n-1)-1) for n >= 2.]
• N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS