login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A090243 Permutation of natural numbers generated by 4-rowed array shown below. 5
1, 7, 2, 11, 6, 3, 13, 10, 5, 4, 19, 14, 9, 8, 23, 18, 15, 12, 25, 22, 17, 16, 31, 26, 21, 20, 35, 30, 27, 24, 37, 34, 29, 28, 43, 38, 33, 32, 47, 42, 39, 36, 49, 46, 41, 40, 55, 50, 45, 44, 59, 54, 51, 48, 61, 58, 53, 52, 67, 62, 57, 56, 71, 66, 63, 60, 73, 70, 65, 64, 79, 74 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

1 7 11 13 19 23 25 31 35 37 43 47 ...

2 6 10 14 18 22 26 30 34 38 42 46 ...

3 5  9 15 17 21 27 29 33 39 41 45 ...

4 8 12 16 20 24 28 32 36 40 44 48 ...

REFERENCES

M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988

Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997

LINKS

Table of n, a(n) for n=1..72.

CROSSREFS

Cf. A088520, A090298, A092260, A113807.

Sequence in context: A246948 A248283 A147677 * A216150 A145338 A104586

Adjacent sequences:  A090240 A090241 A090242 * A090244 A090245 A090246

KEYWORD

easy,nonn

AUTHOR

Giovanni Teofilatto, Jan 24 2004

EXTENSIONS

Corrected and extended by Ray Chandler, Jan 30 2004

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 18 12:18 EDT 2019. Contains 328160 sequences. (Running on oeis4.)