1,1

Table of n, a(n) for n=1..51.

If you have 4 types of objects (coin denominations) you can have 35 different sets of 4. Out of these 35 only two have the same value: you can make 40 cents out of 4 dimes or out of a quarter and 3 nickels. Thus a(4) = 34.

Sequence in context: A019457 A099589 A008141 * A279015 A005893 A008131

Adjacent sequences: A119648 A119649 A119650 * A119652 A119653 A119654

nonn

Tanya Khovanova, Jul 28 2006

approved