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A102042
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a(n) = a(n-1) + last digit of a(n-1), starting at 9.
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0
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9, 18, 26, 32, 34, 38, 46, 52, 54, 58, 66, 72, 74, 78, 86, 92, 94, 98, 106, 112, 114, 118, 126, 132, 134, 138, 146, 152, 154, 158, 166, 172, 174, 178, 186, 192, 194, 198, 206, 212, 214, 218, 226, 232, 234, 238, 246, 252, 254, 258, 266, 272, 274, 278, 286, 292
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| After 1 or 2 initial terms, respectively, the same as A102041. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 30 2008]
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (2,-2,2,-1).
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FORMULA
| G.f.: (-5x^4-2x^3+8x^2+9)/((x-1)^2 (x^2+1)) [Charles R Greathouse IV, Oct 04 2011]
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EXAMPLE
| 34+4=38, 38+8=46.
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MAPLE
| P:=proc(i) local a, b, c, n; a:=9; print(a); for n from 0 by 1 to i do a:=a+a-10*trunc(a/10) ; print(a); od; end: P(100); [From Paolo P. Lava (paoloplava(AT)gmail.com), Sep 26 2008]
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MATHEMATICA
| NestList[#+Last[IntegerDigits[#]]&, 9, 60] (* From Harvey P. Dale, Sep 19 2011 *)
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PROG
| (PARI) Vec((-5*x^4-2*x^3+8*x^2+9)/((x-1)^2*(x^2+1))+O(x^99)) \\ Charles R Greathouse IV, Oct 04 2011
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CROSSREFS
| Sequence in context: A069562 A072502 A195268 * A121282 A205716 A110529
Adjacent sequences: A102039 A102040 A102041 * A102043 A102044 A102045
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KEYWORD
| easy,nonn,base
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AUTHOR
| Samantha Stones (devilsdaughter2000(AT)hotmail.com), Dec 25 2004
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