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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A127640 Triangle read by rows in which row n contains n-1 0's followed by prime(n). 7
2, 0, 3, 0, 0, 5, 0, 0, 0, 7, 0, 0, 0, 0, 11, 0, 0, 0, 0, 0, 13, 0, 0, 0, 0, 0, 0, 17, 0, 0, 0, 0, 0, 0, 0, 19, 0, 0, 0, 0, 0, 0, 0, 0, 23, 0, 0, 0, 0, 0, 0, 0, 0, 0, 29, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 31, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 37, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 41, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A127641 = this sequence * A051731.

LINKS

Table of n, a(n) for n=1..101.

EXAMPLE

First few rows of the triangle are:

2;

0, 3

0, 0, 5;

0, 0, 0, 7;

0, 0, 0, 0, 11;

...

MAPLE

A127640 := proc(n, m) if m < n then 0; else ithprime(n) ; fi ; end: for n from 1 to 15 do for m from 1 to n do printf("%d, ", A127640(n, m)) ; od ; od ; # R. J. Mathar, May 19 2007

CROSSREFS

Cf. A127641, A127638, A127639, A051731.

Sequence in context: A167990 A071391 A102390 * A113303 A080089 A322841

Adjacent sequences:  A127637 A127638 A127639 * A127641 A127642 A127643

KEYWORD

nonn,tabl,easy

AUTHOR

Gary W. Adamson, Jan 21 2007

EXTENSIONS

More terms from R. J. Mathar, May 19 2007

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 20 04:37 EDT 2019. Contains 328247 sequences. (Running on oeis4.)