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A322693
Seven-column table read by rows: Primitive distinct septuples that have the same value of phi, sigma, and tau.
12
98422632, 98724000, 99373500, 100693920, 101356380, 111298770, 114002850, 306564000, 312681120, 314675820, 335624850, 345611970, 353938650, 354008850, 378502560, 387919200, 390471300, 399564396, 402010740, 428530050, 428773950, 620451360, 650334048, 650695584, 654615840, 654976476, 661275384, 691042044
OFFSET
1,1
COMMENTS
The terms are consecutive septuples, ordered so that (A) a(7i-6) < a(7i-5) < ... < a(7i) for i > 0, and (B) a(7i+1) < a(7i+8) for i >= 0. This sequence has primitive solutions only. If k is relatively prime to all of the terms in a primitive septuple, then multiplying the terms in that septuple by k gives another solution - see A322683.
LINKS
EXAMPLE
98422632, 98724000, 99373500, 100693920, 101356380, 111298770, and 114002850 have the same value of phi (24883200), sigma (341228160), and tau (192), so these seven numbers are in the sequence.
KEYWORD
nonn,tabf
AUTHOR
Jud McCranie, Dec 30 2018
STATUS
approved