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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A162371 Lexicographically earliest permutation of the natural numbers such that, when seen as a triangle read by rows, for n>1 the sums of rows are prime numbers. 5
1, 2, 3, 4, 5, 8, 6, 7, 9, 15, 10, 11, 12, 13, 21, 14, 16, 17, 18, 19, 23, 20, 22, 24, 25, 26, 27, 29, 28, 30, 31, 32, 33, 34, 35, 40, 36, 37, 38, 39, 41, 42, 43, 44, 47, 45, 46, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 68, 66, 67, 69, 70, 71, 72 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A162373 = row sums: A162373(n)=SUM(a(k):A000124(n-1)<=k<=A000217(n));

A162372 = right edge: A162372(n)=a(A000217(n));

A162375 = inverse: A162375(a(n))=n and a(A162375(n))=n;

A162374 = fixed points: a(A162374(n)) = A162374(n).

LINKS

R. Zumkeller, Table of n, a(n) for n = 1..1000

Index entries for sequences that are permutations of the natural numbers

EXAMPLE

row ____________ initial terms _____________ row sum

1 : ................. 1 .......................... 1

2 : ............... 2 .. 3 ....................... 5

3 : ............. 4 .. 5 .. 8 ................... 17

4 : ........... 6 .. 7 .. 9 . 15 ................ 37

5 : ........ 10 . 11 . 12 . 13 . 21 ............. 67

6 : ...... 14 . 16 . 17 . 18 . 19 . 23 ......... 107

7 : .... 20 . 22 . 24 . 25 . 26 . 27 . 29 ...... 173

8 : .. 28 . 30 . 31 . 32 . 33 . 34 . 35 . 40 ... 263.

CROSSREFS

Sequence in context: A082359 A266406 A275152 * A269856 A146941 A194067

Adjacent sequences:  A162368 A162369 A162370 * A162372 A162373 A162374

KEYWORD

nonn,tabl

AUTHOR

Reinhard Zumkeller, Jul 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 25 07:53 EDT 2019. Contains 324347 sequences. (Running on oeis4.)