The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A035502 Lower of pair of consecutive happy numbers. 4
 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 Cf. A007770, A035503. Sequence in context: A049203 A065403 A278054 * A259509 A183838 A043355 Adjacent sequences:  A035499 A035500 A035501 * A035503 A035504 A035505 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified February 21 20:46 EST 2020. Contains 332111 sequences. (Running on oeis4.)