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.

Previous Showing 11-13 of 13 results.

A036427 Number of ternary rooted trees with n nodes and height exactly 12.

Original entry on oeis.org

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 11, 76, 403, 1817, 7309, 27079, 94252, 312620, 998058, 3090168, 9331500, 27604348, 80270182, 230077622, 651469482, 1825536305, 5069886635, 13971416287, 38242837777, 104061066617, 281680779030, 758947045088
Offset: 0

Views

Author

N. J. A. Sloane, Eric Rains (rains(AT)caltech.edu)

Keywords

Links

Crossrefs

Cf. A036370, A036437.

A036443 Number of ternary rooted trees with n nodes and height exactly 3.

Original entry on oeis.org

0, 0, 0, 1, 2, 4, 4, 5, 4, 4, 3, 2, 1, 1
Offset: 0

Views

Author

N. J. A. Sloane and Eric Rains (rains(AT)caltech.edu)

Keywords

Links

Crossrefs

Cf. A036370, A036437.

A126886 Triangle read by rows, arising in enumeration of 4-trees by diameter.

Original entry on oeis.org

1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 5, 6, 8, 7, 7, 5, 5, 3, 2, 1, 1, 1, 2, 7, 12, 23, 30, 42, 47, 55, 53, 53, 45, 40, 29, 23
Offset: 0

Views

Author

N. J. A. Sloane, Aug 04 2007

Keywords

Comments

See reference for precise definition.

Examples

			Triangle begins:
1
1
1 1 1
1 1 2 1 1
1 2 5 6 8 7 7 5 5 3 2 1 1
1 2 7 12 23 30 42 47 55 53 53 45 40 29 23 ...

Links

Crossrefs

Cf. A000602 (diagonal sums when rows are displaced by the appropriate amounts), A036437.
Previous Showing 11-13 of 13 results.

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

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