A168231 a(n)^2 = digital sum of (A076503(n))^2.

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

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 A322348

Adjacent sequences: A168228 A168229 A168230 * A168232 A168233 A168234

Keyword

base,nonn

Author

Zak Seidov, Nov 21 2009

Status

approved