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A174793 Triangle read by rows: R(n,k)=n mod 2^Omega(k), where Omega( ) is number of prime divisors counted with multiplicity and 1 <= k <= n. 2
0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 2, 0, 2, 0, 1, 1, 3, 1, 3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 2, 0, 2, 0, 2, 2, 2, 0, 1, 1, 3, 1, 3, 1, 3, 3, 3, 1, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 4, 0, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 5, 1, 0, 0, 0, 2, 0, 2, 0, 6, 2, 2, 0, 6, 0, 2 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,19

LINKS

Table of n, a(n) for n=1..105.

EXAMPLE

Triangle begins

0;

0, 0;

0, 1, 1;

0, 0, 0, 0;

0, 1, 1, 1, 1;

0, 0, 0, 2, 0, 2;

MATHEMATICA

Omega[n_] := If[n<2, 0, Plus@@Transpose[FactorInteger[n]][[2]]]; Flatten[Table[Mod[n, 2^Omega[k]], {n, 15}, {k, n}]]

CROSSREFS

Cf. A174624.

Sequence in context: A263485 A263489 A238660 * A245718 A192011 A152855

Adjacent sequences:  A174790 A174791 A174792 * A174794 A174795 A174796

KEYWORD

nonn,tabl

AUTHOR

Juri-Stepan Gerasimov, Nov 30 2010

STATUS

approved

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Last modified April 25 00:29 EDT 2019. Contains 322446 sequences. (Running on oeis4.)