A342624 The x-coordinates of the vectors used to construct the Babylonian Wurm.

0, 1, 2, 2, 2, 0, -1, -2, 0, 1, 3, 4, 4, 5, 5, 4, 3, 0, -1, -2, -4, -3, 0, 1, 4, 2, 3, 5, 0, -1, -2, -6, -8, -7, -8, -9, -9, -9, -8, -9, -9, -7, -6, -1, -2, -5, -3, -7, -4, -6, 0, 1, 2, 8, 9, 10, 11, 12, 12, 11, 12, 10, 12, 11, 12, 9, 8, 5, 7, 2

Offset: 1

Author

James Rayman, Apr 09 2021

Keywords

• sign
• easy

Comments

Equivalently, this sequence gives the differences of the x-coordinates of successive vertices of the Babylonian Wurm.

Links

• James Rayman, Table of n, a(n) for n = 1..10000
• Index entries for sequences related to coordinates of 2D curves

Crossrefs

See A256175 for the definition of the Babylonian Wurm.

See A342625 for the y-coordinates.

Cf. A342622, A342623, A342626, A342627.

Programs

Python

for i in range(10000): print(i+1, wurm(i+1)[0] - wurm(i)[0]) # wurm is defined in the program for A256175.

Formula

a(n) = A342622(n+1) - A342622(n).