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.

A057123 Global ranks of terms of A057122: tells which terms of A014486 form rooted plane binary trees also when interpreted as codes for ordinary rooted planar trees.

Original entry on oeis.org

0, 2, 12, 16, 91, 99, 124, 140, 165, 868, 881, 944, 970, 1014, 1213, 1221, 1364, 1398, 1442, 1633, 1649, 1736, 1887, 9474, 9493, 9619, 9657, 9727, 10317, 10330, 10606, 10657, 10727, 11130, 11156, 11295, 11550, 13452, 13465, 13528, 13554, 13598
Offset: 0

Views

Author

Antti Karttunen, Aug 11 2000

Keywords

Examples

			E.g., we have codes A014486(2) = 10, A014486(12) = 180, A014486(16) = 210, A014486(91) = 2920, for which the corresponding mountain ranges are:
................................./\/\
......../\/\...../\/\........./\/____\
/\/\./\/____\.../____\/\.../\/________\
and corresponding trees have degree 3 in all non-leaf, non-root vertices:
...............................0.0
........0.0......0.0..........0.1.
0.0....0.1........1.0........0.1..
.1......1..........1..........1...
		

Programs

  • Maple
    map(CatalanRankGlobal, A057122)