2^0: 1
2^1: 2
2^2: 4
2^3: 8
2^4: 16
2^5: 32
2^6: 64
2^7: 128
2^8: 256
2^9: 512
2^10: 1024
2^11: 2048
2^12: 4096
2^13: 8192
2^14: 16384
2^15: 32768
2^16: 65536
2^17: 131072
2^18: 262144
2^19: 524288
2^20: 1048576

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