cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A154926 Signed version of Pascal's triangle. Diagonal positive, rest negative.

Original entry on oeis.org

1, -1, 1, -1, -2, 1, -1, -3, -3, 1, -1, -4, -6, -4, 1, -1, -5, -10, -10, -5, 1, -1, -6, -15, -20, -15, -6, 1, -1, -7, -21, -35, -35, -21, -7, 1, -1, -8, -28, -56, -70, -56, -28, -8, 1
Offset: 1

Views

Author

Mats Granvik, Jan 17 2009

Keywords

Comments

Matrix inverse of this lower triangular array is A154921. Signs in columns as in sequence A153881.
Exponential Riordan array [2-exp(x),x]. - Paul Barry, Apr 06 2011

Examples

			From _Mats Granvik_, Jul 24 2009: (Start)
Table begins:
.1
-1....1
-1...-2....1
-1...-3...-3....1
-1...-4...-6...-4....1
-1...-5..-10..-10...-5....1
-1...-6..-15..-20..-15...-6....1
-1...-7..-21..-35..-35..-21...-7....1
-1...-8..-28..-56..-70..-56..-28...-8....1
-1...-9..-36..-84.-126.-126..-84..-36...-9....1
-1..-10..-45.-120.-210.-252.-210.-120..-45..-10....1
-1..-11..-55.-165.-330.-462.-462.-330.-165..-55..-11....1
(End)
		

Crossrefs