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A000337号作为一个简单的表

n个a(n)
00
11
25
17
449
5129
6321
7769
81793
94097
109217
1120481
1245057
1398305
14212993
15458753
16983041
172097153
184456449
199437185
2019922945
2141943041
2288080385
23184549377
24385875969
25805306369
261677721601
273489660929
287247757313
2915032385537
3031138512897
3164424509441

[0,1,5,17,49,129,321,769,1793,4097,9217,20481,45057,98305,212993,458753,983041,2097153,4456449,9437185,19922945,41943041,88080385,184549377,385875969,805306369,1677721601,3489660929,7247757313,15032385537,31138512897,64424509441]