A112296 Smret suoiverp eht fo mus fo esrever.

9, 9, 81, 99, 891, 9801, 9801, 19602, 39204, 79497, 499851, 548856, 1077021, 2274822, 4459554, 8909109, 70282971, 87111288, 664223571, 730645938, 5791910751, 6272012637, 36351143631, 49985258994, 88971507999, 789520249881, 868572264879, 7470454307481

Offset: 1

Author

N. J. A. Sloane, Nov 30 2005

Keywords

• nonn
• base

References

• Zak Seidov, Posting to Seq Fan mailing list, Nov 28 2005.

Links

• Michael De Vlieger, Table of n, a(n) for n = 1..2419

Crossrefs

Cf. A004086.

Programs

Maple

a[0]:=9: S:=a[0]: for n from 1 to 30 do S1:=convert(S,base,10): c:=nops(S1): a[n]:=add(S1[c+1-j]*10^(j-1),j=1..c): S:=S+a[n]: od: seq(a[n],n=0..30); # Emeric Deutsch, Feb 03 2006

Mathematica

Nest[Append[#, IntegerReverse@ Total@ #] &, {9}, 27] (* Michael De Vlieger, Sep 09 2021 *)

Python

def aupton(terms):
    alst, s = [9], 9
    for n in range(2, terms+1):
        alst.append(int(str(s)[::-1]))
        s += alst[-1]
    return alst
print(aupton(28)) # Michael S. Branicky, Sep 09 2021

Extensions

More terms from Emeric Deutsch, Feb 03 2006