Look-and-say sequence

Summary

Look-and-say sequence is an integer sequence^[1]. It ranks in the top 3% of integer_sequence entities by monthly Wikipedia readership (134 views/month).^[2]

Key Facts

• Look-and-say sequence's instance of is recorded as integer sequence^[3].
• John Horton Conway is named after Look-and-say sequence^[4].
• staring is named after Look-and-say sequence^[5].
• Look-and-say sequence's Freebase ID is recorded as /m/02qg64^[6].
• Look-and-say sequence's OEIS ID is recorded as A005150^[7].
• Look-and-say sequence's defining formula is recorded as \operatorname{JHC}(a_1^{n_1}a_2^{n_2}\dotsm a_k^{n_k}) = n_1a_1n_2a_2\dotsm n_ka_k\qquad(\forall i\colon a_i \ne a_{i+1};\;n_i \ge 1)^[8].
• Look-and-say sequence's MathWorld ID is recorded as LookandSaySequence^[9].
• Look-and-say sequence's maintained by WikiProject is recorded as WikiProject Mathematics^[10].
• Look-and-say sequence's Microsoft Academic ID is recorded as 95733196^[11].

Why It Matters

Look-and-say sequence ranks in the top 3% of integer_sequence entities by monthly Wikipedia readership (134 views/month).^[2] It has Wikipedia articles in 13 language editions, a strong signal of global cultural recognition.^[12] It is known by 27 alternative names across languages and contexts.^[13]