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A316481 Squares whose arithmetic mean of digits is 1 (i.e., the sum of digits equals the number of digits). 2
1, 1100401, 2220100, 100040004, 100100025, 100220121, 100400400, 101002500, 102030201, 102212100, 103002201, 104040000, 110250000, 121022001, 121220100, 123210000, 132020100, 144000000, 210221001, 225000000, 310112100, 324000000, 400040001, 400400100 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Each term's number of digits is in A056991 (Numbers with digital root 1, 4, 7, or 9). For every term k in A056991, this sequence contains at least one k-digit term, with the exception of k=4. (See A316480.)
LINKS
Giovanni Resta, Table of n, a(n) for n = 1..10000 (first 1543 terms from Jon E. Schoenfield)
EXAMPLE
1049^2 = 1100401, a 7-digit number whose digit sum is 1+1+0+0+4+0+1 = 7, so 1100401 is a term.
CROSSREFS
Intersection of A000290 and A061384. - Michel Marcus, Jul 06 2018
Sequence in context: A268036 A184384 A086212 * A253619 A235221 A060087
KEYWORD
nonn,base
AUTHOR
Jon E. Schoenfield, Jul 04 2018
STATUS
approved

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Last modified May 18 15:24 EDT 2024. Contains 372664 sequences. (Running on oeis4.)