A065787 a(1) = 49; for n > 1, a(n) is the smallest integer > 0 such that the concatenation a(n)a(n-1)...a(2)a(1) is a square.

49, 18, 167, 2401, 4086461727, 14079962896835441528, 309880704108832516500624685064706000856, 4681896102766617737298881383797502847166028831212571921983062786215145771871779

Offset

1,1

Comments

a(n) = A061363(n+1) for n > 1.

Links

Table of n, a(n) for n=1..8.

Crossrefs

Cf. A061359, A061363, A065691, A065785, A065786.

Sequence in context: A145583 A304139 A305045 * A033369 A236247 A299470

Adjacent sequences: A065784 A065785 A065786 * A065788 A065789 A065790

Keyword

base,nonn

Author

Klaus Brockhaus, Nov 19 2001

Status

approved