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A047021
a(n) = Sum_{i=0..n} T(i,n-i) where T is given by A047020.
0
1, 2, 3, 5, 9, 18, 28, 53, 101, 195, 390, 704, 1371, 2676, 5253, 10506, 19840, 39056, 76968, 152168, 304336, 586864, 1161577, 2300544, 4565558, 9131116, 17813324, 35369544, 70256203, 139745471, 279490942, 549138068, 1092533184
OFFSET
0,2
CROSSREFS
Sequence in context: A064769 A320641 A365640 * A201359 A369392 A047031
KEYWORD
nonn
EXTENSIONS
a(26) corrected by Sean A. Irvine, May 10 2021
STATUS
approved