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A135600 Angled numbers with an internal digit as the vertex. 8
100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The structure of digits represent an angle. The vertex is an internal digit. In the graphic representation the points are connected by imaginary line segments from left to right. The last acute-angled number of this sequence has 14 digits: 98765432102468. The last right-angled number of this sequence has 19 digits: 9876543210123456789. All numbers that have 3 digits are members of this sequence. Next members are 1000, 1012, 1024, 1036, 1048, 1110, 1111, 1112, 1113, 1114,....

LINKS

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

EXAMPLE

The acute-angled number 12342 (see A135601).

. . . . .

. . . 4 .

. . 3 . .

. 2 . . 2

1 . . . .

The right-angled number 12343 (see A135602).

. . . . .

. . . 4 .

. . 3 . 3

. 2 . . .

1 . . . .

The obtuse-angled number 12344 (see A135603).

. . . . .

. . . 4 4

. . 3 . .

. 2 . . .

1 . . . .

The straight-angled (or straight-line) number 12345 (see A135643).

. . . . 5

. . . 4 .

. . 3 . .

. 2 . . .

1 . . . .

CROSSREFS

Cf. A134810, A134853, A134941, A134970, A135641, A135642, A135643, A135601, A135602, A135603.

Sequence in context: A115048 A112525 A000865 * A134999 A301516 A204581

Adjacent sequences:  A135597 A135598 A135599 * A135601 A135602 A135603

KEYWORD

base,nonn

AUTHOR

Omar E. Pol, Dec 02 2007

STATUS

approved

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Last modified February 21 03:06 EST 2019. Contains 320364 sequences. (Running on oeis4.)