This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A240754 Numbers n with digit_sum(n*n) - 1 = digit_sum((n+1)*(n+1)). 4
 8, 26, 53, 98, 107, 143, 161, 170, 179, 188, 224, 233, 242, 260, 269, 278, 287, 296, 350, 368, 386, 404, 413, 431, 449, 476, 494, 503, 539, 548, 557, 584, 593, 629, 638, 647, 674, 683, 737, 746, 773, 791, 818, 827, 863, 872, 908, 926, 944, 998, 1007, 1043 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A240752(a(n)) = 0. LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 PROG (Haskell) import Data.List (elemIndices) a240754 n = a240754_list !! (n-1) a240754_list = elemIndices (-1) a240752_list CROSSREFS Cf. A202089, A239878, A004159, A007953, A000290. Sequence in context: A138502 A143894 A126176 * A074238 A126264 A225274 Adjacent sequences:  A240751 A240752 A240753 * A240755 A240756 A240757 KEYWORD nonn,base AUTHOR Reinhard Zumkeller, Apr 12 2014 STATUS approved

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

Last modified March 19 00:15 EDT 2019. Contains 321306 sequences. (Running on oeis4.)