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A158029 Sides of squares which are filled exactly (no holes, no overlaps) by the digits needed to write a subsequence of consecutive square numbers, starting with 0. 1
1, 2, 4, 5, 7, 8, 22, 23, 27, 28, 32, 33, 37, 77, 84, 91, 98, 105, 112, 119, 126, 133, 140, 521, 529, 531, 539, 541, 549, 551, 559, 561, 569, 571, 579, 581, 589, 591, 599, 601, 609, 611, 619, 621, 629, 631, 639, 641, 649, 651, 659, 661, 669, 671 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The square numbers fitting exactly in a "squares-digits square" are given by A158028. Terms computed by Jean-Marc Falcoz.

LINKS

Table of n, a(n) for n=1..54.

Eric Angelini, Digit Spiral

E. Angelini, Digit Spiral [Cached copy, with permission]

EXAMPLE

...0...01...0116...01161

.......49...4964...49640

............2539...25390

............6481...64811

...................21144

The above squares, filled exactly by a subsequence of consecutive square numbers starting with 0 have sides 1, 2, 4, 5. There is no side-3 square with this property. The next properly filled square will have side 7.

CROSSREFS

Sequence in context: A141493 A103118 A262969 * A217378 A140204 A084577

Adjacent sequences:  A158026 A158027 A158028 * A158030 A158031 A158032

KEYWORD

base,nonn

AUTHOR

Eric Angelini, Mar 11 2009

STATUS

approved

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Last modified May 20 03:10 EDT 2019. Contains 323412 sequences. (Running on oeis4.)