def pow2
import bend-ml-tensor-array@0.1.19.0/main.bend as BendMlTensorArrayimport Base
557def pow2(d: Nat) -> Nat:
558 match d:
559 case 0n:
560 1n
561 case 1n++q:
562 # bend-lint: disable-next bend-lint-rules/performance/repeated_call -- pow2 appears only in proofs' types not-expected-because: the package never runs it (NOTES 2026-10-17)
563 Nat.add(pow2(q), pow2(q))