1,2

A131929(a(n)) = n and A131929(m) <> n for m<a(n).

a(2) = 2^2 * 3 * 11 = 132 containing 2 and 3;

a(3) = 3 * 5 * 7^2 = 735 containing 3, 5, and 7;

a(4) = 2^2 * 3 * 13 * 137 = 21372 containing 2, 3, 13, and 137;

a(5) = 2 * 3 * 7^2 * 13 * 71 = 271362 containing 2, 3, 7, 13, and 71.

Cf. A131930, A131929.

Sequence in context: A119778 A071606 A080282 this_sequence A020524 A099682 A135759

Adjacent sequences: A131928 A131929 A131930 this_sequence A131932 A131933 A131934

nonn,base

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 30 2007