A337356 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A337356

Numbers whose digit sum of their square is equal to their square root.

%I #16 Sep 12 2020 05:54:17

%S 0,1,49,484,625,784,1296

%N Numbers whose digit sum of their square is equal to their square root.

%F a(n) = A055575(n)^2. - _Joerg Arndt_, Sep 01 2020

%t Select[Range[0, 36], Plus @@ IntegerDigits[#^4] == # &]^2 (* _Amiram Eldar_, Sep 08 2020 *)

%Y Cf. A055575.

%K nonn,base,fini,full

%O 1,3

%A _Evzen Stejskal_, Aug 24 2020