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A316485
Squares whose arithmetic mean of digits is 5 (i.e., the sum of digits is 5 times the number of digits).
1
64, 12769, 14884, 24649, 24964, 27556, 30976, 33856, 37249, 37636, 44944, 48841, 56644, 65536, 66049, 70756, 75076, 75625, 80089, 80656, 85264, 96721, 10778089, 10982596, 11464996, 11498881, 11648569, 11957764, 11992369, 12369289, 12559936, 12687844, 12909649
OFFSET
1,1
COMMENTS
Each term's number of digits is in A174438 (Numbers that are congruent to {0, 2, 5, 8} mod 9). For every positive term k in A174438, this sequence contains at least one k-digit term. (See A316480.)
LINKS
EXAMPLE
8^2 = 64, a 2-digit number whose digit sum is 6+4 = 10 = 5*2, so 64 is a term.
3283^2 = 10778089, an 8-digit number whose digit sum is 1+0+7+7+8+0+8+9 = 40 = 5*8, so 10778089 is a term.
MATHEMATICA
Select[Range[4000]^2, Mean[IntegerDigits[#]]==5&] (* Harvey P. Dale, Sep 10 2022 *)
CROSSREFS
Intersection of A000290 and A061388. - Michel Marcus, Jul 06 2018
Sequence in context: A376524 A209779 A220300 * A292025 A185562 A264127
KEYWORD
nonn,base
AUTHOR
Jon E. Schoenfield, Jul 04 2018
STATUS
approved