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A200779 a(n) = number of i in the range 1 <= i <= n such that b(i)=b(n), where b is the sequence A053615 taken with offset 1. 1
1, 1, 2, 2, 1, 3, 3, 4, 2, 1, 3, 5, 4, 6, 4, 2, 1, 3, 5, 7, 5, 8, 6, 4, 2, 1, 3, 5, 7, 9, 6, 10, 8, 6, 4, 2, 1, 3, 5, 7, 9, 11, 7, 12, 10, 8, 6, 4, 2, 1, 3, 5, 7, 9, 11, 13, 8, 14, 12, 10, 8, 6, 4, 2, 1, 3, 5, 7, 9, 11, 13, 15, 9, 16, 14, 12, 10, 8, 6, 4, 2, 1, 3, 5, 7, 9, 11, 13, 15, 17, 10, 18, 16, 14, 12, 10, 8, 6, 4, 2, 1, 3, 5, 7 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
This assumes that the word "digit" in the definition in the Wimblik web page is changed to "number".
LINKS
Quoss Wimblik, A new numeral system
MAPLE
# b[n] = number of i <= n such that a[i]=a[n].
FREQ:=proc(a) local b, i, c, n, t1:
if whattype(a) <> list then RETURN([]); fi:
b:=[];
for n from 1 to nops(a) do
c:=0; t1:=a[n];
for i from 1 to n do if a[i]=t1 then c:=c+1; fi; od:
b:=[op(b), c];
od;
RETURN(b);
end:
# read A053615 as a list called s1
FREQ(s1);
CROSSREFS
Sequence in context: A245370 A321341 A284549 * A286558 A368153 A355668
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Nov 22 2011
STATUS
approved

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Last modified April 24 05:33 EDT 2024. Contains 371918 sequences. (Running on oeis4.)