A342626 Second differences of the x-coordinates of the vertices of the Babylonian Wurm.

1, 1, 0, 0, -2, -1, -1, 2, 1, 2, 1, 0, 1, 0, -1, -1, -3, -1, -1, -2, 1, 3, 1, 3, -2, 1, 2, -5, -1, -1, -4, -2, 1, -1, -1, 0, 0, 1, -1, 0, 2, 1, 5, -1, -3, 2, -4, 3, -2, 6, 1, 1, 6, 1, 1, 1, 1, 0, -1, 1, -2, 2, -1, 1, -3, -1, -3, 2, -5, 1, 3, 3, -1, -1, -2, -5

Offset

1,5

Comments

Equivalently, the first differences of A342624.

Links

James Rayman, Table of n, a(n) for n = 1..10000

Index entries for sequences related to coordinates of 2D curves

Formula

a(n) = A342622(n+2) - 2*A342622(n+1) + A342622(n).

Prog

(Python) for i in range(10000): print(i+1, wurm(i+2)[0] - 2*wurm(i+1)[0] + wurm(i)[0]) # wurm is defined in the program for A256175

Crossrefs

See A256175 for the definition of the Babylonian Wurm.

See A342622 and A342623 for the coordinates of the Wurm.

See A342624 and A342625 for the first differences.

See A342627 for the second differences of the y-coordinates.

Sequence in context: A276167 A105522 A131774 * A358005 A078316 A207668

Adjacent sequences: A342623 A342624 A342625 * A342627 A342628 A342629

Keyword

sign,easy

Author

James Rayman, Apr 17 2021

Status

approved