OFFSET
0,3
COMMENTS
These numbers were introduced in 2006 in the yearly number puzzle in the Dutch Journal "Pythagoras" (see http://www.pythagoras.nu). It is known that there are infinitely many Coster numbers (result of David Kloet, Albert Hendriks and Arjen Stolk, unpublished).
LINKS
Matthijs Coster, Feb 02 2007, Table of n, a(n) for n = 0..89
Matthijs Coster, www.wiskundemeisjes.nl/20061030/coster-getallen/ (in Dutch)
Matthijs Coster, www.matcos.nl/sequences
Pythagoras, www.pythagoras.nu (in Dutch)
EXAMPLE
36 is in the sequence since 3*6+3*6 = 36
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Matthijs Coster, Dec 31 2006, Feb 02 2007
STATUS
approved