A273971 Numbers y such that there exists a pair x, n, with x < y, x != n and y != n that makes {x,y,n,n} an amicable multiset

756000, 803040, 1267560, 1442448, 1851360, 2535120, 3209760, 3477240, 3926160, 3969840, 4413240, 4664880, 6094368, 6840540, 7617960, 7783020, 8027880, 8360352, 8586900, 9215640, 9559200, 9596520, 9697380, 9811620, 9815400, 9938160, 10063200, 10234224

Offset

1,1

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 x values, see A273970.

If the condition x<y were dropped, the terms from A259306 would also belong here.

Links

John Cerkan, Table of n, a(n) for n = 1..7515

John Cerkan, Python code

Example

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

Crossrefs

Cf. A259302, A259303, A259304, A259305, A259306, A273969, A273970.

Sequence in context: A204229 A290161 A244308 * A259305 A172586 A172571

Adjacent sequences: A273968 A273969 A273970 * A273972 A273973 A273974

Keyword

nonn

Author

John Cerkan, Jul 17 2016

Status

approved