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!)
A207975 Triangle where row n consists of a sequence of n positive integers g(1) < g(2) < ... < g(n) with the minimal sum such that A001222(g(i)+g(j)) = A001222(g(i)) + A001222(g(j)) for all 1 <= i < j <= n. 1
1, 1, 2, 2, 6, 10, 3, 9, 19, 43, 5, 15, 29, 39, 53, 5, 15, 29, 39, 53, 173, 5, 39, 53, 111, 173, 237, 293, 7, 35, 67, 151, 211, 215, 547, 607, 5, 29, 113, 269, 353, 449, 509, 634, 1613, 41, 99, 201, 521, 597, 761, 921, 1193, 1361, 1761, 41, 257, 461, 941, 1637, 2957, 3269, 3821, 4126, 4157, 4637 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..66.

EXAMPLE

The triangle starts with:

n=1: 1

n=2: 1, 2

n=3: 2, 6, 10

n=4: 3, 9, 19, 43

n=5: 5, 15, 29, 39, 53

n=6: 5, 15, 29, 39, 53, 173

n=7: 5, 39, 53, 111, 173, 237, 293

n=8: 7, 35, 67, 151, 211, 215, 547, 607

n=9: 5, 29, 113, 269, 353, 449, 509, 634, 1613

...

CROSSREFS

Row sums are given by A059393.

Cf. A059363.

Sequence in context: A034805 A192659 A327485 * A321623 A077063 A081728

Adjacent sequences:  A207972 A207973 A207974 * A207976 A207977 A207978

KEYWORD

nonn,tabl,changed

AUTHOR

Max Alekseyev, Feb 22 2012

EXTENSIONS

More terms from Sean A. Irvine, Sep 21 2022

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 October 4 01:04 EDT 2022. Contains 357237 sequences. (Running on oeis4.)