login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A137583 Number of elements in the n-th period of the Janet periodic table of elements. 18
2, 2, 8, 8, 18, 18, 32, 32 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Essentially 2 followed by the first terms of A093907.

This puts Hydrogen and Helium in the first row, Lithium and Beryllium into the second, Boron to Magnesium into the third etc.

LINKS

Table of n, a(n) for n=1..8.

Albert Tarantola, PSE of Elements (Janet form).

Anonymous, Janet periodic table, Web Elements Chemistry Nexus

Anonymous, Periodic Table: Formulations, Chemogenesis web book

MATHEMATICA

Flatten@ Table[2 (n #)^2 & /@ {-1, 1}, {n, 4}] (* Michael De Vlieger, Jul 22 2016 *)

CROSSREFS

Cf. A093907, A137508, A138509, A137575.

Sequence in context: A271342 A060818 A082887 * A099328 A073090 A120544

Adjacent sequences: A137580 A137581 A137582 * A137584 A137585 A137586

KEYWORD

nonn,less,fini,full

AUTHOR

Paul Curtz, Apr 26 2008

EXTENSIONS

Edited by R. J. Mathar, Oct 02 2009

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 30 12:16 EST 2023. Contains 359943 sequences. (Running on oeis4.)