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.

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A107677 Numbers A such that the square of concatenation AA is of form NNMM.

Original entry on oeis.org

8, 89, 98, 406, 593, 998, 4445, 4544, 5455, 5554, 9899, 9998, 34687, 44443, 55556, 65312, 90242, 99998, 219374, 285713, 286714, 296297, 297296, 340066, 362636, 363637, 374219, 416989, 583010, 625780, 636362, 637363, 659933, 702703, 703702
Offset: 1

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Author

Lekraj Beedassy, May 20 2005

Keywords

Comments

N and M must be of equal length, leading zeros are allowed. The corresponding values NM are in A107678.

Examples

			593 is in the sequence because we have 593593^2 = 352352649649; 998 is in the sequence since 998998^2 = 997997004004 (M has two leading zeros); 219374 is in the sequence since 219374219374^2 = 48125048125951876951876 (N has one leading zero).

Crossrefs

Cf. A107678, A106497.

Extensions

Edited, corrected and extended by Klaus Brockhaus, May 22 2005
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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