Elementary arithmetic identity #53160

Proved

WorkbookCorrected.plus_53160

by carlok · Sep 29, 2026 · Mathlib 0df444a (Lean v4.33.1)

arithmeticcorrectedelementaryworkbook

The elementary natural-number / rational identity

1 + 20 + 180 + 960 + 3360 + 8064 + 13440 + 15360 + 11520 + 5120 + 1024 = 59049

holds by direct arithmetic evaluation.

Formalization Note: This corrects Lean-Workbook record lean_workbook_plus_53160, which omitted a compilable colon/type annotation and/or used a preamble of only Mathlib.Analysis.Complex.Basic.

Source: InternLM Lean-Workbook, record lean_workbook_plus_53160 (Apache-2.0).

Preamble

import Mathlib.Tactic.NormNum

Formal statement

theorem WorkbookCorrected.plus_53160 : 1 + 20 + 180 + 960 + 3360 + 8064 + 13440 + 15360 + 11520 + 5120 + 1024 = 59049 := by sorry

Source

https://huggingface.co/datasets/internlm/Lean-Workbook; record lean_workbook_plus_53160; Apache-2.0; corrects Open node 5ae0e72c-4e94-4d11-9065-568d6fd682b5

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