A083715 (greatest prime <= n) mod (greatest prime factor of n).

0, 0, 0, 1, 0, 2, 0, 1, 1, 2, 0, 2, 0, 6, 3, 1, 0, 2, 0, 4, 5, 8, 0, 2, 3, 10, 2, 2, 0, 4, 0, 1, 9, 14, 3, 1, 0, 18, 11, 2, 0, 6, 0, 10, 3, 20, 0, 2, 5, 2, 13, 8, 0, 2, 9, 4, 15, 24, 0, 4, 0, 30, 5, 1, 9, 6, 0, 16, 21, 4, 0, 2, 0, 36, 3, 16, 7, 8, 0, 4, 1, 38, 0, 6, 15, 40, 25, 6, 0, 4, 11, 20, 27, 42

Offset

1,6

Comments

a(n) = A007917(n) mod A006530(n);

n>1: a(n) = 0 iff n is prime.

Links

Table of n, a(n) for n=1..94.

Crossrefs

Cf. A083716, A083717, A083714, A083718.

Sequence in context: A377780 A329867 A342652 * A037135 A374521 A202177

Adjacent sequences: A083712 A083713 A083714 * A083716 A083717 A083718

Keyword

nonn

Author

Reinhard Zumkeller, May 04 2003

Status

approved