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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A035502 Lower of pair of consecutive happy numbers. 5
31, 129, 192, 262, 301, 319, 367, 391, 565, 622, 637, 655, 912, 931, 1029, 1092, 1114, 1121, 1151, 1184, 1211, 1221, 1257, 1274, 1299, 1332, 1447, 1474, 1511, 1527, 1574, 1581, 1724, 1744, 1754, 1771, 1784, 1814, 1851, 1874, 1880, 1881, 1902, 1929, 2062 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
REFERENCES
R. K. Guy, Unsolved Problems Number Theory, Sect. E34.
LINKS
Eric Weisstein's World of Mathematics, Happy Number
MATHEMATICA
f[n_] := Total[IntegerDigits[n]^2]; t = Select[Range[5000], NestWhile[f, #, UnsameQ, All] == 1 &]; t[[Select[Range[Length[t] - 1], t[[#]] == t[[# + 1]] - 1 &]]] (* T. D. Noe, Aug 23 2011 *)
CROSSREFS
Sequence in context: A049203 A065403 A278054 * A259509 A183838 A043355
KEYWORD
nonn,easy,base
AUTHOR
EXTENSIONS
More terms from Sascha Kurz, Mar 24 2002
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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 19 01:57 EDT 2024. Contains 370952 sequences. (Running on oeis4.)