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A237986 Area of smallest square containing n L's with short side lengths 1, 2, ..., n. 1
0, 4, 16, 49, 121, 196, 324, 484, 676, 961, 1296, 1681, 2116, 2704, 3364, 3969, 4761, 5625, 6724 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..18.

Erich Friedman, L's in Squares

FORMULA

a(n) = A211372(n)^2

EXAMPLE

Illustration:

.

. a -     b b a -    - - - b b b b    - - - - - - - - a b b

. a a     b b a a    c c c b b b b    - - - - - - - a a b b

.         b b b b    c c c b b a a    - - - - - - - b b b b

.         b b b b    c c c b b a -    d d d d - - - b b b b

.                    c c c c c c -    d d d d - c c c c c c

.                    c c c c c c -    d d d d - c c c c c c

.                    c c c c c c -    d d d d - c c c c c c

.                                     d d d d d d d d c c c

.                                     d d d d d d d d c c c

.                                     d d d d d d d d c c c

.                                     d d d d d d d d - - -

.

.  4         16            49                  121

.

CROSSREFS

Sequence in context: A222387 A222936 A119005 * A086601 A224147 A227266

Adjacent sequences:  A237983 A237984 A237985 * A237987 A237988 A237989

KEYWORD

nonn,hard,more

AUTHOR

Ivan Panchenko, Feb 16 2014

STATUS

approved

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Last modified September 23 19:28 EDT 2020. Contains 337315 sequences. (Running on oeis4.)