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A352697
a(n) = A037237(n-1) - A281434(n).
0
0, 0, 1, 0, 2, 0, 2, 1, 2, 0, 6, 0, 3, 0, 6, 0, 4, 0, 6, 0, 5, 1, 7, 2, 6, 2, 7, 1, 8, 0, 8, 0, 8, 0, 11, 0, 9, 1, 10, 0, 11, 0, 11, 0, 11, 0, 14, 3, 12, 0, 13, 0, 13, 0, 15, 0, 15, 0, 15, 0, 16, 0, 18, 0, 16, 0, 17, 0, 17, 0, 19, 0, 18, 2, 19, 0, 19, 0, 20, 2
OFFSET
1,5
COMMENTS
It appears that this sequence has an infinite number of zeros, i.e., A281434(n) agrees with A037237(n-1) at an infinite number of indices; also, it seems that a(n) = O(n).
MATHEMATICA
With[{m = 20}, Table[(4 n + 3 n^2 + 2 n^3)/3, {n, m}] - Length /@ Rest[NestList[Expand[D[#, x]] &, x^x^x, m]]]
CROSSREFS
Sequence in context: A319164 A070288 A329643 * A165414 A330868 A178687
KEYWORD
nonn
AUTHOR
STATUS
approved