Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A137587
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A137587 Triangle read by rows: A051731 * A026794. +0
3
1, 2, 1, 3, 0, 1, 5, 2, 0, 1, 6, 1, 0, 0, 1, 11, 3, 2, 0, 0, 1, 12, 2, 1, 0, 0, 0, 1, 20, 6, 1, 2, 0, 0, 0, 1, 25, 4, 3, 1, 0, 0, 0, 0, 1, 37, 9, 2, 1, 2, 0, 0, 0, 0, 1, 43, 8, 3, 1, 1, 0, 0, 0, 0, 0, 1, 70, 16, 6, 3, 1, 2, 0, 0, 0, 0, 0, 1 (list; table; graph; listen)
OFFSET

1,2

COMMENT

That is, regard A051731 and A026794 as lower triangular square matrices and multiply them, then take the lower triangle of the product,

Left column = A083710 starting (1, 2, 3, 5, 6, 11, 12,...). Row sums = A047968.

FORMULA

Inverse mobius transform of the partition triangle, A026794

EXAMPLE

First few rows of the triangle are:

.1;

.2, 1;

.3, 0, 1;

.5, 2, 0, 1;

.6, 1, 0, 0, 1;

.11, 3, 2, 0, 0, 1;

.12, 2, 1, 0, 0, 0, 1;

.20, 6, 1, 2, 0, 0, 0, 1;

.25, 4, 3, 1, 0, 0, 0, 0, 1;

....

CROSSREFS

Cf. A026794, A051731, A083710, A047968.

Sequence in context: A113287 A096798 A158902 this_sequence A168021 A137639 A113288

Adjacent sequences: A137584 A137585 A137586 this_sequence A137588 A137589 A137590

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 27 2008

EXTENSIONS

Typo in 9th row corrected by M. F. Hasler, Jun 08 2009

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified December 21 10:15 EST 2009. Contains 171081 sequences.


AT&T Labs Research