natural numbers 1 + 2 + 3 + 4 + ⋯ is a divergent series. The nth partial sum of the series is the triangular number ∑ k = 1 n k = n ( n + 1 ) 2 , {\displaystyle...

partial sums of 1 − 2 + 3 − 4 + ... are: 1, 1 − 2 = −1, 1 − 2 + 3 = 2, 1 − 2 + 3 − 4 = −2, 1 − 2 + 3 − 4 + 5 = 3, 1 − 2 + 3 − 4 + 5 − 6 = −3, ... The sequence...

4.3.2.1. (which stands for "4 girls, 3 days, 2 cities, 1 chance") is a 2010 British crime thriller film written, produced and directed by Noel Clarke,...

4, 3, 2, 1 or 4321 may refer to: 4.3.2.1., 2010 film by Noel Clarke ...4 ..3 ..2 ..1 ...Morte, a 1967 Italian science fiction film "4, 3, 2, 1" (k-os song)...

Lotus 1-2-3 is a discontinued spreadsheet program from Lotus Software (later part of IBM). It was the first killer application of the IBM PC, was hugely...

dispatchers. 9-1-1 is a joint production between Reamworks, Ryan Murphy Television, and 20th Television. 9-1-1's first season premiered on January 3, 2018 Due...

is 4–2–1–3, where the midfielders are split into two defensive and one offensive player; as such, this formation can be considered a type of 4–3–3. An...

4 3 2 1 is a 2017 novel by Paul Auster published by Henry Holt and Co. It describes four alternate versions of the life of Archie Ferguson in the 1950s...

OpenOffice 4, LibreOffice 4.1 is released". ghacks.net. Archived from the original on 14 February 2014. Retrieved 4 March 2014. "Release Notes 3.4". The Document...

3-2-1 Contact is an American science educational television show produced by the Children's Television Workshop (CTW, now known as Sesame Workshop). It...