OFFSET
0,3
COMMENTS
Stated in more concrete terms, a(n) is the smallest amount of a transaction that cannot be achieved with the transfer (in either direction) of at most 3 coins with values among the previous terms.
EXAMPLE
a(4)=17 because: 11=10+1, 12=10+1+1, 13=10+4-1, 14=10+4, 15=10+4+1, 16=10+10-4, but there is no way to create 17 using at most three values in {1,4,10}
CROSSREFS
KEYWORD
nonn
AUTHOR
Andrew Weimholt, Jul 22 2004
STATUS
approved