1,2
Table of n, a(n) for n=1..15.
a(n) = sum of n-th row terms of triangle A178568
a(6) = 27 = (1 + 5 + 5 + 9 + 5 + 2)
Cf. A178568
Sequence in context: A226015 A328547 A137685 * A093065 A301596 A026007
Adjacent sequences: A169823 A169824 A169825 * A169827 A169828 A169829
nonn
Gary W. Adamson, May 29 2010
approved