1,2

Table of n, a(n) for n=1..60.

a(n) = Sum_{k=1..n} A097847(n,k). - Alois P. Heinz, Jul 12 2016

For n = 3: 1/3 and 3/3 = 1/1 are unit fractions themselves. 2/3 can be generated as the sum of two unit fractions: 1/2 + 1/6. This gives us a(3) = 1 + 2 + 1 = 4.

Row sums of A097847.

Sequence in context: A116477 A116920 A116919 * A270097 A167511 A242398

Adjacent sequences: A270425 A270426 A270428 * A270430 A270431 A270432

nonn

Carsten Peust, Jul 12 2016

approved