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A337621 a(n) is the length of the largest run of contiguous grid points on the n-th antidiagonal of the Even Conant lattice that are not on an edge, or 0 if no such point exists. 2
0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 1, 2, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 3, 2, 2, 1, 2, 3, 4, 4, 3, 2, 1, 2, 2, 2, 1, 1, 1, 2, 1, 1, 2, 2, 1, 2, 2, 3, 4, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 3, 4, 5, 6, 7, 8, 8, 7, 6, 5, 4, 3, 2, 3, 4, 4, 4, 4, 4, 3, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,15

LINKS

Rémy Sigrist, Table of n, a(n) for n = 0..8191

Rémy Sigrist, Illustration of initial terms

Rémy Sigrist, Scatterplot of the first 2^15 terms

Rémy Sigrist, C++ program for A337621

FORMULA

a(n) <= A337620(n).

Apparently, abs(a(2*n) - 2*a(n)) <= 1.

EXAMPLE

See Links section.

PROG

(C++) See Links section.

CROSSREFS

Cf. A328078, A337620, A337622.

Sequence in context: A064286 A002471 A218622 * A091243 A306615 A037826

Adjacent sequences:  A337618 A337619 A337620 * A337622 A337623 A337624

KEYWORD

nonn,look

AUTHOR

Rémy Sigrist, Sep 09 2020

STATUS

approved

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Last modified May 26 11:30 EDT 2022. Contains 354086 sequences. (Running on oeis4.)