1,1

with(numtheory): f := n->order(4, 4*n+1);

Sequence in context: A021427 A091834 A050210 this_sequence A111804 A132368 A157248

Adjacent sequences: A003570 A003571 A003572 this_sequence A003574 A003575 A003576

nonn

N. J. A. Sloane (njas(AT)research.att.com).