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A215614 Numbers n that are not multiples of 10 such that sum of digits of n^2 is 7. 2
4, 5, 32, 49, 149, 1049 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Sequence is complete.

Except for the number 1, these six and numbers 10^k+1 (A062397) are the only numbers (up to trailing 0's) whose square has sum of digits less than 9. - M. F. Hasler, Sep 23 2014

LINKS

Table of n, a(n) for n=1..6.

PROG

(PARI) for(n=1, 9e9, n%10&&sumdigits(n^2)==7&&print1(n", ")) \\ M. F. Hasler, Sep 23 2014

CROSSREFS

Cf. A004159 = Sum of digits of n^2.

Sequence in context: A271148 A271200 A262711 * A013468 A244333 A041907

Adjacent sequences:  A215611 A215612 A215613 * A215615 A215616 A215617

KEYWORD

nonn,base,fini,full

AUTHOR

Zak Seidov, Aug 17 2012

STATUS

approved

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Last modified February 18 09:57 EST 2019. Contains 320250 sequences. (Running on oeis4.)