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A168231 a(n)^2 = digital sum of (A076503(n))^2. 0
2, 3, 2, 4, 4, 4, 4, 4, 5, 2, 4, 5, 4, 4, 5, 5, 4, 4, 4, 5, 5, 5, 5, 4, 5, 4, 5, 5, 5, 4, 4, 5, 4, 5, 5, 5, 5, 5, 4, 5, 5, 5, 5, 4, 5, 5, 5, 5, 5, 4, 4, 5, 5, 5, 5, 5, 4, 5, 5, 4, 4, 5, 5, 5, 5, 7, 5, 4, 5, 5, 5, 5, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 7, 5, 5, 7, 5, 5, 7, 5, 5, 5, 7, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n)^2 = A007953((A076503(n))^2).

LINKS

Table of n, a(n) for n=1..105.

CROSSREFS

Cf. A076503 Prime numbers whose squares have square digital sums, A061910 Numbers n such that sum of digits of n^2 is a square, A007953 Digital sum (i.e. sum of digits) of n, A000040 The prime numbers.

Sequence in context: A304735 A318048 A235805 * A235728 A205546 A081315

Adjacent sequences:  A168228 A168229 A168230 * A168232 A168233 A168234

KEYWORD

base,nonn

AUTHOR

Zak Seidov, Nov 21 2009

STATUS

approved

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Last modified September 19 08:05 EDT 2021. Contains 347556 sequences. (Running on oeis4.)