the constant sequence <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle a_{n}=2}"><semantics><mrow class="MJX-TeXAtom-ORD"><mstyle displaystyle="true" scriptlevel="0"><msub><mi>a</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi></mrow></msub><mo>=</mo><mn>2</mn></mstyle></mrow><annotation encoding="application/x-tex">{\displaystyle a_{n}=2}</annotation></semantics></math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/7d4f6d88d91ec4091aee7484e2f2b22e52edcad7" class="mwe-math-fallback-image-inline" aria-hidden="true" style="vertical-align: -0.671ex; width:6.709ex; height:2.509ex;" alt="{\displaystyle a_{n}=2}"></span>
<a rel="nofollow" class="external text" href="http://kulla.me/">Stephan Kulla</a> (<a href="//commons.wikimedia.org/wiki/User:Stephan_Kulla" title="User:Stephan Kulla">User:Stephan Kulla</a>)
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