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A274817 as a simple table

na(n)
01
1-1
24
38
419
532
664
7125
8256
9512
101027
112048
124096
138189
1416384
1532768
1665539
17131072
18262144
19524285
201048576
212097152
224194307
238388608
2416777216
2533554429
2667108864
27134217728
28268435459
29536870912
301073741824
312147483645
324294967296
338589934592

[1,-1,4,8,19,32,64,125,256,512,1027,2048,4096,
 8189,16384,32768,65539,131072,262144,524285,
 1048576,2097152,4194307,8388608,16777216,33554429,
 67108864,134217728,268435459,536870912,1073741824,
 2147483645,4294967296,8589934592]