1,1

From a quiz

K. Russell and P. Carter, Number Puzzles, W. Foulsham and Co. Ltd. (1993).

1:55; 2:10; 2:25; 2:40; 2:55

Adjacent sequences: A122472 A122473 A122474 this_sequence A122476 A122477 A122478

Sequence in context: A049515 A049519 A053243 this_sequence A089256 A112136 A119609

nonn

Herman Jamke (hermanjamke(AT)fastmail.fm), Sep 14 2006