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 A057515 Number of separate "mountains" in mountain ranges encoded by A014486, number of bottom branches (trunks) in the corresponding rooted plane trees, i.e., the degree of the root node. 29
 0, 1, 2, 1, 3, 2, 2, 1, 1, 4, 3, 3, 2, 2, 3, 2, 2, 1, 1, 2, 1, 1, 1, 5, 4, 4, 3, 3, 4, 3, 3, 2, 2, 3, 2, 2, 2, 4, 3, 3, 2, 2, 3, 2, 2, 1, 1, 2, 1, 1, 1, 3, 2, 2, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 6, 5, 5, 4, 4, 5, 4, 4, 3, 3, 4, 3, 3, 3, 5, 4, 4, 3, 3, 4, 3, 3, 2, 2, 3, 2, 2, 2, 4, 3, 3, 2, 2, 3, 2, 2, 2, 3, 2, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS This sequence is produced when the function 'length' (present in programming languages like Lisp, Scheme, Prolog and Haskell) acts on symbolless S-expressions encoded by A014486/A063171. LINKS A. Karttunen, Gatomorphisms (Includes the complete Scheme program for computing this sequence) CROSSREFS a(n) gives the first digit of A071153(n). Sequence in context: A136662 A023595 A177718 * A300712 A282463 A265337 Adjacent sequences:  A057512 A057513 A057514 * A057516 A057517 A057518 KEYWORD nonn AUTHOR Antti Karttunen, Sep 03 2000 STATUS approved

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Last modified January 19 20:41 EST 2020. Contains 331066 sequences. (Running on oeis4.)