A211679 Triangle of earliest friendly numbers having n friends.

6, 28, 6, 28, 496, 84, 270, 1488, 1638, 84, 270, 1488, 1638, 24384, 210, 17360, 43400, 284480, 2229500, 2886100, 3780, 66960, 167400, 406224, 1097280, 6656832, 13035330, 3780, 66960, 167400, 406224, 1097280, 6656832, 13035330, 29410290

Offset: 2

Author

T. D. Noe, May 10 2012

Keywords

• nonn
• tabf
• hard

Comments

Row n contains the earliest set of friendly numbers of length n. The sequence A211677 contains the last element of each row.

Links

• Donovan Johnson, Table of n, a(n) for n = 2..45

Crossrefs

Cf. A074902 (friendly numbers), A211677.