A115548 Numbers k such that k^2 is the concatenation of two numbers m and 7*m.

91304347826086956521739130434782608695652173913043478261, 121739130434782608695652173913043478260869565217391304348, 152173913043478260869565217391304347826086956521739130435, 182608695652173913043478260869565217391304347826086956522

Offset

1,1

Links

Table of n, a(n) for n=1..4.

Tanya Khovanova, Non Recursions

Crossrefs

Cf. A102567, A106497, A115527 - A115556.

Sequence in context: A115453 A095504 A115547 * A095506 A291354 A095508

Adjacent sequences: A115545 A115546 A115547 * A115549 A115550 A115551

Keyword

nonn,base

Author

Giovanni Resta, Jan 25 2006

Status

approved