login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Record maxima in A288818.
2

%I #21 Jul 31 2017 12:57:37

%S 0,1,3,4,5,6,8,12,13,17,18,21,22,23,25,30,34,41,45,54,58,60,62,66,75,

%T 80,82,83,88,104,110,124,131,147,163,166,173,194,220,228,233,257,290,

%U 313,334,350,359,365,412,468,477,503,520

%N Record maxima in A288818.

%C If one assumes that larger records occur at A288818 indices beginning with 22 or 23, then a(54)-a(64) are: 528, 534, 538, 542, 636, 657, 687, 728, 764, 768, and 847. - _Hans Havermann_, Jul 31 2017

%t ric[d_, lp_] := Block[{p, e, i, j, n = Length@d}, If[n == 0, cnt++, If[d[[1]] > 0, Do[p = FromDigits@ Take[d, i]; If[p > lp && PrimeQ@p, ric[Take[d, i - n], p]; Do[e = Take[d, {i + 1, j}]; If[e[[1]] > 0 && e != {1}, ric[Take[d, j - n], p]], {j, i+1, n}]], {i, n}]]]]; a[n_] := (cnt = 0; ric[ IntegerDigits@ n, 1]; cnt); Union@ FoldList[Max, Array[a, 10^6]] (* _Michael De Vlieger_, Jun 19 2017, after _Giovanni Resta_ at A288818 *)

%Y Cf. A288818, A288820 (records' position), A080670.

%K nonn,base,more

%O 1,3

%A _Hans Havermann_, Jun 17 2017

%E a(46)-a(53) from _Giovanni Resta_, Jun 20 2017