login
A026095
a(n) = Sum{T(k,k-1)}, k = 1,2,...,n, where T is the array defined in A026082.
0
1, 3, 6, 9, 22, 55, 153, 431, 1235, 3555, 10278, 29793, 86562, 251983, 734776, 2145825, 6275148, 18373299, 53856156, 158025189, 464112300, 1364247183, 4013353935, 11815188003, 34807249137, 102606325139, 302646363728, 893175905781
OFFSET
1,2
CROSSREFS
Equals A024998(n) + 3, n>1.
Sequence in context: A050889 A327140 A329863 * A061929 A358403 A318032
KEYWORD
nonn
STATUS
approved