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A132451 as a simple table

na(n)
10
20
30
40
547
691
7143
8285
9539
101051
112071
124179
138219
1416427
1532791
1665581
17131087
18262183
19524327
201048659
212097191
224194361
238388651
2416777243
2533554447
2667108935
27134217767
28268435539
29536870935
301073741907
312147483663

[0,0,0,0,47,91,143,285,539,1051,2071,4179,8219,
 16427,32791,65581,131087,262183,524327,1048659,
 2097191,4194361,8388651,16777243,33554447,
 67108935,134217767,268435539,536870935,1073741907,
 2147483663]