This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A134647 #19 Nov 20 2023 18:52:10 %S A134647 0,1,2,14,35,78,135,216,268,330,413,417,451,525,540,595,600,656,662, %T A134647 728,755,842,900,929,938,1037,1118,1189,1270,1361,1362,1373,1394,1425, %U A134647 1466,1517,1578,1649,1730,1821,1822,1833,1854,1885,1926,1977 %N A134647 Let a(1) = 0, a(2) = 1; and a(n) = a(n-1) + [the two-digit integer split by the comma which separates a(n-1) and a(n-2)]. %H A134647 N. J. A. Sloane, <a href="/A134647/b134647.txt">Table of n, a(n) for n = 1..20000</a> (First 1000 terms from _Harvey P. Dale_) %e A134647 135 = 78 + 57, since the comma in 35,78 splits the number 57. %p A134647 # to compute the first M terms, from _N. J. A. Sloane_, Nov 20 2023 %p A134647 Ldigit:=proc(n) local v; v:=convert(n, base, 10); v[-1]; end; %p A134647 M:=100; %p A134647 s:=[0,1]; i:=0; j:=1; %p A134647 for m from 2 to M do %p A134647 k := j + 10*(i mod 10) + Ldigit(j); s:=[op(s),k]; i:=j; j:=k; od: %p A134647 s; %t A134647 a[1]=0;a[2]=1; %t A134647 a[n_]:=a[n]=a[n-1]+10 Mod[a[n-2],10]+IntegerDigits[a[n-1]][[1]]; %t A134647 Table[a[k],{k,100}] %t A134647 nxt[{a_,b_}]:={b,b+10IntegerDigits[a][[-1]]+First[IntegerDigits[b]]}; NestList[ nxt,{0,1},50][[All,1]] (* _Harvey P. Dale_, Jul 01 2020 *) %Y A134647 Cf. A121805, A367357 (first differences). %K A134647 nonn,base %O A134647 1,3 %A A134647 _N. J. A. Sloane_, Oct 17 2009, based on a posting to the Sequence Fans Mailing List by Eric Angelini, Oct 15 2009 %E A134647 Corrected and extended with Mma code by _Farideh Firoozbakht_, Oct 15 2009