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A015441 as a simple table

na(n)
00
11
21
37
413
555
6133
7463
81261
94039
1011605
1135839
12105469
13320503
14953317
152876335
168596237
1725854247
1877431669
19232557151
20697147165
212092490071
226275373061
2318830313487
2456482551853
25169464432775
26508359743893
271525146340543
284575304803901
2913726182847159

[0,1,1,7,13,55,133,463,1261,4039,11605,35839,
 105469,320503,953317,2876335,8596237,25854247,
 77431669,232557151,697147165,2092490071,
 6275373061,18830313487,56482551853,169464432775,
 508359743893,1525146340543,4575304803901,
 13726182847159]