The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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 Cf. A056991, A069711, A316480. Intersection of A000290 and A061384. - Michel Marcus, Jul 06 2018 Sequence in context: A268036 A184384 A086212 * A253619 A235221 A060087 Adjacent sequences: A316478 A316479 A316480 * A316482 A316483 A316484 KEYWORD nonn,base AUTHOR Jon E. Schoenfield, Jul 04 2018 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

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