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A220089 as a simple table

na(n)
0-242
1-241
2-239
3-235
4-227
5-211
6-179
7-115
813
9269
10781
111805
123853
137949
1416141
1532525
1665293
17130829
18261901
19524045
201048333
212096909
224194061
238388365
2416776973
2533554189
2667108621
27134217485
28268435213
29536870669
301073741581
312147483405
324294967053

[-242,-241,-239,-235,-227,-211,-179,-115,13,269,
 781,1805,3853,7949,16141,32525,65293,130829,
 261901,524045,1048333,2096909,4194061,8388365,
 16776973,33554189,67108621,134217485,268435213,
 536870669,1073741581,2147483405,4294967053]