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.

A068641 Smallest n-digit palindromic triangular number, or 0 if no such number exists.

Original entry on oeis.org

1, 55, 171, 3003, 15051, 617716, 1269621, 35133153, 178727871, 1264114621, 13953435931, 0, 1313207023131, 19895044059891, 114401848104411, 1250444114440521, 11121736463712111, 357961407704169753
Offset: 1

Views

Author

Amarnath Murthy, Feb 28 2002

Keywords

Examples

			a(4) = 3003 = 77*78/2 is the smallest 4-digit palindromic triangular number.
a(12) = 0 as no 12-digit palindromic triangular number exists.
		

Crossrefs

Extensions

Edited by Patrick De Geest, Mar 24 2002

A068642 Index of the smallest n-digit palindromic triangular number, or 0 if no such number exists.

Original entry on oeis.org

1, 10, 18, 77, 173, 1111, 1593, 8382, 18906, 50281, 167053, 0, 1620621, 6307938, 15126258, 50008881, 149142458, 846122222, 2480116437, 5513600773, 14667896198, 49786655918, 246644446642, 529670494286, 2466444446642
Offset: 1

Views

Author

Amarnath Murthy, Feb 28 2002

Keywords

Examples

			a(4) = 77 as 77*78/2 = 3003 is the smallest 4-digit palindromic triangular number.
a(12) = 0 as no 12-digit palindromic triangular number exists.
		

Crossrefs

Extensions

Edited by Patrick De Geest, Mar 24 2002

A068643 Largest n-digit palindromic triangular number, or 0 if no such number exists.

Original entry on oeis.org

6, 66, 666, 8778, 66066, 828828, 6295926, 61477416, 178727871, 6172882716, 87350505378, 0, 68742000024786, 82078700787028, 684866959668486, 8208268228628028, 67898244444289876, 514816979979618415
Offset: 1

Views

Author

Amarnath Murthy, Feb 28 2002

Keywords

Examples

			a(4) = 8778 = 132*133/2 is the largest 4-digit palindromic triangular number.
a(12) = 0 as no 12-digit palindromic triangular number exists.
		

Crossrefs

Extensions

Edited by Patrick De Geest, Mar 24 2002
Showing 1-3 of 3 results.