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A219032 Number of distinct squares as subwords of decimal representation of n-th square. 2
1, 1, 1, 1, 2, 1, 1, 3, 2, 2, 3, 2, 3, 4, 3, 2, 2, 2, 2, 3, 3, 3, 2, 2, 1, 2, 1, 2, 2, 3, 3, 3, 4, 4, 2, 4, 3, 4, 4, 2, 4, 4, 4, 5, 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, 3, 3, 5, 4, 4, 3, 2, 2, 2, 4, 4, 2, 3, 2, 3, 6, 4, 3, 2, 2, 3, 1, 2, 3, 3, 5, 2, 2, 2, 2, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

a(n) = number of squares in n-th row of triangle A219031.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

FORMULA

a(n) = sum(A010052(A219031(n,k)): k=0..A120004(n^2)).

EXAMPLE

.   n   row n in A219031

.  -----------------------------

.  20   [0, 4, 40, 400]            a(20) = #{0, 4, 400} = 3;

.  21   [1, 4, 41, 44, 441]        a(21) = #{1, 4, 441} = 3;

.  22   [4, 8, 48, 84, 484]        a(22) = #{4, 484} = 2;

.  23   [2, 5, 9, 29, 52, 529]     a(23) = #{9, 529} = 2;

.  24   [5, 6, 7, 57, 76, 576]     a(24) = #{576} = 1;

.  25   [2, 5, 6, 25, 62, 625]     a(25) = #{25, 625} = 2.

PROG

(Haskell)

a219032 = sum . map a010052 . a219031_row

CROSSREFS

Sequence in context: A133776 A060118 A329143 * A234567 A241950 A316776

Adjacent sequences:  A219029 A219030 A219031 * A219033 A219034 A219035

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Nov 10 2012

STATUS

approved

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Last modified September 30 10:18 EDT 2020. Contains 337439 sequences. (Running on oeis4.)