A322680 Four-column table read by rows: Quadruples that have the same value of phi, sigma, and tau.

1167320, 1197912, 1275318, 1345542, 3502548, 3536232, 3684252, 3695412, 4846520, 4980792, 5302638, 5594622, 5196000, 5299680, 5857830, 6000150, 5276448, 5568672, 5605308, 5764220, 6115656, 6510834, 6866106, 6869346, 6119520, 6159780, 6586650, 6928350, 6595560, 6917064, 6960840, 7818690

Offset

1,1

Comments

The terms are consecutive quadruples, ordered so that (A) a(4i-3) < a(4i-2) < a(4i-1) < a(4i) for i > 0, and (B) a(4i+1) < a(4i+5) for i >= 0. Primitive solutions are in A322690.

Links

Table of n, a(n) for n=1..32.

Example

1167320, 1197912, 1275318, and 1345542 have the same value of phi (362880), sigma (3283200), and tau (64), so these four numbers are in the sequence.

Crossrefs

Cf. A134922, A322689, A322678, A322679, A322681, A322682, A322683, A322684, A322685, A322686, A322687.

Sequence in context: A204307 A233664 A322690 * A288077 A112043 A114677

Adjacent sequences: A322677 A322678 A322679 * A322681 A322682 A322683

Keyword

nonn,tabf

Author

Jud McCranie, Jan 16 2019

Status

approved