

A306430


Twelvecolumn table read by rows: Primitive distinct 12tuples that have the same value of phi, sigma, and tau.


1



38848397472, 38850486624, 39955028960, 41002131936, 41266440252, 41271882804, 41273232372, 42433832980, 42439669580, 42441951860, 43545898068, 44591929866
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OFFSET

1,1


COMMENTS

The terms are consecutive 12tuples, ordered so that (A) a(12i11) < a(11i10) < ... < a(12i) for i > 0, and (B) a(12i+1) < a(12i+13) for i >= 0. This sequence has primitive solutions only. If k is relatively prime to all of the terms in a primitive 12tuple, then multiplying the terms in that 12tuple by k gives another solution.


LINKS

Table of n, a(n) for n=1..12.


EXAMPLE

38848397472, 38850486624, 39955028960, 41002131936, 41266440252, 41271882804, 41273232372, 42433832980, 42439669580, 42441951860, 43545898068, and 44591929866 have the same value of phi (12070840320), sigma (121347072000), and tau (384), so these twelve numbers are in the sequence.


CROSSREFS

Cf. A134922, A322687, A322688, A322689, A322690, A322691, A322692, A322693, A322694, A322695, A322696, A322697.
Sequence in context: A234072 A112446 A295460 * A216018 A256842 A225886
Adjacent sequences: A306427 A306428 A306429 * A306431 A306432 A306433


KEYWORD

nonn,tabf,more


AUTHOR

Jud McCranie, Feb 14 2019


STATUS

approved



