login
A087045
Indices k where A057176(k) = 1.
2
1, 4, 64, 400, 489, 519, 2164, 3589, 8703, 84761, 358837, 1463825, 1668392, 20471837, 31960443
OFFSET
1,2
COMMENTS
By definition k is in the sequence if and only if k divides A057176(k-1). - Farideh Firoozbakht, Aug 04 2003
No more terms < 3870000. - David Wasserman, Mar 31 2005
EXAMPLE
a(0) = 0 since A057176(0) = 1.
MAPLE
N := 10^5: A := array(0..N): A[0] := 1; for m from 1 to N do A[m] := add(A[j], j=0..modp(A[m-1], m)): od: a := NULL: for i from 0 to N do if A[i]=1 then a := a, i; fi; od; a;
CROSSREFS
Cf. A057176.
Sequence in context: A165516 A064935 A030098 * A169801 A103751 A053959
KEYWORD
hard,more,nonn
AUTHOR
W. Edwin Clark and Farideh Firoozbakht at the suggestion of Leroy Quet, Aug 03 2003
EXTENSIONS
More terms from David Wasserman, Mar 31 2005
a(14)-a(15) from Michael S. Branicky, Mar 22 2024
STATUS
approved