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A035502
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Lower of pair of consecutive happy numbers.
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4
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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; internal format)
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OFFSET
| 1,1
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REFERENCES
| R. K. Guy, Unsolved Problems Number Theory, Sect. E34.
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LINKS
| Eric Weisstein's World of Mathematics, Happy Number
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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 *)
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CROSSREFS
| Cf. A007770, A035503.
Sequence in context: A079141 A049203 A065403 * A183838 A043355 A023728
Adjacent sequences: A035499 A035500 A035501 * A035503 A035504 A035505
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KEYWORD
| nonn,easy,base
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 24 2002
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