A264775 Square root of concatenation(A090566(n), A090566(n+1)).

4, 25, 159, 531, 3101, 24903, 243740, 433129, 2703038, 21046245, 53478992, 292123372, 2164833445, 21425610902, 48888908358, 192151648872, 477890021223, 2279013856319, 19998940546342, 46961100477911, 72630984382646, 259140398165389, 1861711571434526, 14850553878036591, 56672657547446354, 303286443000496342, 2448230500494961492, 4821616822771036069, 24316253937847771953

Offset

1,1

Comments

Sequence A090566 lists the smallest integer larger than the preceding term such that their concatenation is a square. This sequence lists the square root of these squares.

The initial term a(0)=1 corresponds to the natural extension A090566(0):=0 (or an "empty" A090566(0)).

Sequence A082210 is the analog of this corresponding to the variant A082209 of A090566.

Links

David W. Wilson, Table of n, a(n) for n = 1..1839

Crossrefs

Cf. A090566; A082210, A082209.

Sequence in context: A010909 A079750 A195510 * A073517 A208264 A357162

Adjacent sequences: A264772 A264773 A264774 * A264776 A264777 A264778

Keyword

nonn,base

Author

M. F. Hasler, Nov 24 2015

Status

approved