A273970 Numbers x such that there exist a pair y, n with x < y, x != n and y != n that makes {x,y,n,n} an amicable multiset.

695520, 753480, 1113840, 1136520, 1784160, 2313360, 2898720, 3140280, 3865680, 3960600, 4272840, 4500720, 4626720, 6126120, 6167700, 7197960, 7442820, 7731360, 8177400, 8498700, 8784720, 8828820, 8920800, 8966160, 9124920, 9232860, 9664200, 9729720

Offset: 1

Author

John Cerkan, Jul 17 2016

Keywords

• nonn

Comments

We call the multiset {x,y,n,n} amicable iff sigma(x) = sigma(y) = sigma(n) = x+y+n+n. For the n values, see A273969. For the y values, see A273971.

If the condition xA259306 would also belong here.

Examples

			sigma(695520) = sigma(803040) = sigma(702240) = 695520 + 803040 + 702240 + 702240.
		

Links

• John Cerkan, Table of n, a(n) for n = 1..8060
• John Cerkan, Python code

Crossrefs

Cf. A259302, A259303, A259304, A259305, A259306, A273969, A273971.