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A129888
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Start with 10; write down the sum of its digits; add last two terms; repeat.
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2
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10, 1, 11, 2, 13, 4, 17, 8, 25, 7, 32, 5, 37, 10, 47, 11, 58, 13, 71, 8, 79, 16, 95, 14, 109, 10, 119, 11, 130, 4, 134, 8, 142, 7, 149, 14, 163, 10, 173, 11, 184, 13, 197, 17, 214, 7, 221, 5, 226, 10, 236, 11, 247, 13, 260, 8, 268, 16, 284, 14, 298, 19, 317, 11, 328, 13
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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FORMULA
| a(2n+1)=A007618(n+2). For 1<=n<=10: a(2n)=A065075(n+1). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 14 2007
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MATHEMATICA
| nxt[n_]:=Module[{t=Total[n]}, {t, Total[IntegerDigits[t]]}]; Flatten[ NestList[ nxt, {10, 1}, 35]] (* From Harvey P. Dale, Mar 29 2011 *)
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CROSSREFS
| Sequence in context: A130858 A098760 A107408 * A107353 A172171 A164899
Adjacent sequences: A129885 A129886 A129887 * A129889 A129890 A129891
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KEYWORD
| nonn,base
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), May 26 2007
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EXTENSIONS
| More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 14 2007
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