A038670 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A038670

Concatenations of two squares in two ways.

164, 1441, 1625, 1961, 2564, 4841, 12116, 14449, 16400, 25625, 46241, 48464, 115625, 116641, 144100, 148841, 160025, 162500, 163844, 169169, 184964, 193636, 196100, 256400, 361225, 368649, 466564, 484100, 493025, 961009, 973441

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Equals A192993 for terms < 40000000, see comment and b-file in A192993. - Reinhard Zumkeller, Jul 15 2011

Subsequence of A192993; A193095(a(n)) = 2. - Reinhard Zumkeller, Jul 17 2011

LINKS

Table of n, a(n) for n=1..31.

EXAMPLE

a(1) = 164 = concat(1^2,8^2) = concat(4^2, 2^2).

PROG

(Haskell)

import Data.List (elemIndices)

a038670 n = a038670_list !! (n-1)

a038670_list = elemIndices 2 $ map a193095 [0..]

-- Reinhard Zumkeller, Jul 17 2011

CROSSREFS

Sequence in context: A233990 A223455 A251197 * A192993 A250935 A250928

Adjacent sequences: A038667 A038668 A038669 * A038671 A038672 A038673

KEYWORD

base,nonn

AUTHOR

David W. Wilson

STATUS

approved