OFFSET
2,1
EXAMPLE
All 2 integers of [14, 15] have identical values of tau and sigma, namely 4 and 24.
All 3 integers of [46, 51, 55] have identical values of tau and sigma, namely 4 and 72.
All 4 integers of [158, 177, 203, 209] have identical values of tau and sigma, namely 4 and 240.
All 5 integers of [282, 310, 322, 345, 357] have identical values of tau and sigma, namely 8 and 576.
And no lesser numbers have this property.
CROSSREFS
KEYWORD
nonn
AUTHOR
Jean-Marc Rebert, Mar 11 2026
STATUS
approved
