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A225515
First differences of A121347.
1
2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2
OFFSET
1,1
COMMENTS
Apparently a(n) = 1 or 2. From first 10000 terms, 8597 terms = 2.
FORMULA
a(n) = A121347(n+2) - A121347(n+1).
MATHEMATICA
s={2}; f1=4; f2=2; k=2; Do[f1=f1*n^2; While[f2<f1, k++; f2=f2*k]; AppendTo[s, k-1], {n, 3, 100}]; Rest[s]-Most[s]
CROSSREFS
Cf. A121347.
Sequence in context: A022303 A113189 A143098 * A265404 A274353 A183028
KEYWORD
nonn
AUTHOR
Zak Seidov, May 09 2013
STATUS
approved