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A048412 a(n)^2 is a square whose consecutive digits differ by 1. 2
0, 1, 2, 3, 11, 26, 111, 1111, 11111, 111111, 1111111, 11111111, 111111111 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

a(13), if it exists, is > 10^17. - Lars Blomberg, Nov 25 2016

LINKS

Table of n, a(n) for n=0..12.

CROSSREFS

Cf. A002477, A048411.

Sequence in context: A248161 A056851 A284046 * A259428 A002981 A232212

Adjacent sequences:  A048409 A048410 A048411 * A048413 A048414 A048415

KEYWORD

nonn,base,more

AUTHOR

Patrick De Geest, Apr 15 1999

STATUS

approved

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Last modified July 23 14:59 EDT 2017. Contains 289688 sequences.