cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-3 of 3 results.

A143587 Number of 1's in row n of the Kolakoski fan A143477.

Original entry on oeis.org

1, 0, 0, 2, 3, 5, 7, 9, 14, 22, 33, 47, 77, 112, 170, 251, 384, 571, 855, 1275, 1919, 2873, 4305, 6480, 9706, 14569, 21861, 32819, 49201, 73743, 110619, 165937, 248848, 373469, 560078, 840122, 1260542, 1890595, 2835686, 4253984, 6380906, 9571020
Offset: 1

Views

Author

Clark Kimberling, Aug 25 2008

Keywords

Comments

A143586 = A143587 + A143588.

Examples

			The first 4 rows of A143477 are 1; 2; 22; 1122. The respective numbers of 1's are 1,0,0,2.

Crossrefs

Cf. A000002, A143477, A143486, A143588.

A143590 Length of row n of A143589 (a Kolakoski fan).

Original entry on oeis.org

1, 1, 2, 2, 3, 4, 7, 10, 16, 24, 36, 54, 80, 120, 180, 269, 404, 605, 908, 1361, 2041, 3063, 4591, 6890, 10333, 15509, 23259, 34901, 52344, 78516, 117762, 176636, 264944, 397405, 596099, 894193, 1341290, 2011935, 3017927, 4526825
Offset: 1

Views

Author

Clark Kimberling, Aug 25 2008

Keywords

Comments

Conjecture (following Benoit Cloitre's conjecture at A111090):
if L=A143489, then L(n)*(2/3)^n approaches a constant.

Examples

			The first 6 rows of A143589 are 1; 2; 1,1; 2,1; 1,1,2; 2,1,2,2. Their
lengths are 1,1,2,2,3,4.

Crossrefs

Cf. A000002, A111090, A143477, A143586, A143489.

A143588 Number of 2's in row n of the Kolakoski fan A143477.

Original entry on oeis.org

0, 1, 2, 2, 3, 4, 6, 10, 15, 22, 33, 52, 74, 113, 168, 255, 377, 567, 850, 1280, 1916, 2878, 4324, 6473, 9720, 14577, 21862, 32766, 49150, 73758, 110640, 165962, 249013, 373405, 560201, 840358, 1260296, 1890539, 2835987, 4253676, 6380430, 9570746
Offset: 1

Views

Author

Clark Kimberling, Aug 25 2008

Keywords

Comments

A143586 = A143587 + A143588.

Examples

			The first 4 rows of A143477 are 1; 2; 22; 1122. The respective numbers of 1's are 0,1,2,2.

Crossrefs

Cf. A000002, A143477, A143486, A143487.
Showing 1-3 of 3 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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