A115445 Numbers whose square is the concatenation of two numbers k and k-7.

9, 13, 3656545, 4565636, 5434365, 6343456, 3646962589704198389, 6353037410295801612, 9101508044249652935, 7903999111431765764698711045778, 9722180929613583946516892863960

Offset

1,1

Links

Table of n, a(n) for n=1..11.

Example

4023943_4023936 = 6343456^2.

Crossrefs

Cf. A030467, A106497, A115434, A115427, A115438, A115439, A115440, A115441, A115442, A115443, A115444, A115446, A115447.

Sequence in context: A116106 A123813 A147498 * A131602 A004474 A130703

Adjacent sequences: A115442 A115443 A115444 * A115446 A115447 A115448

Keyword

base,nonn

Author

Giovanni Resta, Jan 25 2006

Status

approved