login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A135601 Acute-angled numbers with an internal digit as the vertex. 9
102, 103, 104, 105, 106, 107, 108, 109, 120, 130, 131, 132, 140, 141, 142, 143, 150, 151, 152, 153, 154, 160, 161, 162, 163, 164, 165, 170, 171, 172, 173, 174, 175, 176, 180, 181, 182, 183, 184, 185, 186, 187, 190, 191, 192, 193, 194, 195 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The structure of digits represent an acute angle. The vertex is an internal digit. In the graphic representation the points are connected by imaginary line segments from left to right. This sequence is finite. The last member has 14 digits: 98765432102468.

LINKS

Table of n, a(n) for n=1..48.

EXAMPLE

Illustration using the last member of this sequence:

9 . . . . . . . . . . . . .

. 8 . . . . . . . . . . . 8

. . 7 . . . . . . . . . . .

. . . 6 . . . . . . . . 6 .

. . . . 5 . . . . . . . . .

. . . . . 4 . . . . . 4 . .

. . . . . . 3 . . . . . . .

. . . . . . . 2 . . 2 . . .

. . . . . . . . 1 . . . . .

. . . . . . . . . 0 . . . .

CROSSREFS

Cf. A134810, A134853, A134941, A134970, A135641, A135642, A135643, A135600, A135602, A135603.

Sequence in context: A009101 A031962 A303504 * A296514 A164856 A160712

Adjacent sequences:  A135598 A135599 A135600 * A135602 A135603 A135604

KEYWORD

base,fini,nonn

AUTHOR

Omar E. Pol, Dec 02 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 July 30 16:31 EDT 2021. Contains 346359 sequences. (Running on oeis4.)