A081359 Problem 49 on page 235 of "Mathematics", California Edition, by Carole Greenes et al.

6, 7, 10, 16, 25

Offset: 0

Author

Joe T. Hoang (HoangJoe(AT)yahoo.com), Mar 18 2003

Keywords

• nonn
• unkn

Comments

Several different books match the description, e.g. ISBN 978-0618081776 and ISBN 978-0618081790. The precise definition remains a mystery.

References

• Carole Greenes, Miriam A. Leiva, Bruce R. Vogeli (et al.?), "Mathematics, California Edition", various editions published by Houghton Mifflin Company.

Extensions

Edited by M. F. Hasler, Mar 27 2008