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A337619
a(n) is the number of vertical segments originating from some grid point on the n-th antidiagonal of the Even Conant lattice.
2
1, 1, 1, 1, 1, 2, 1, 1, 1, 3, 2, 1, 1, 4, 1, 3, 1, 2, 3, 4, 2, 4, 1, 4, 1, 5, 4, 4, 1, 6, 3, 4, 1, 4, 2, 6, 3, 6, 4, 8, 2, 6, 4, 5, 1, 10, 4, 5, 1, 9, 5, 12, 4, 5, 4, 10, 1, 9, 6, 5, 3, 11, 4, 7, 1, 8, 4, 11, 2, 10, 6, 7, 3, 9, 6, 16, 4, 12, 8, 14, 2, 7, 6, 15
OFFSET
0,6
COMMENTS
a(n) is the number of k in the range 0..n such that k = 0 or (A337265(k, n-k) = 1 and A337265(k-1, n-k) = 0).
LINKS
Rémy Sigrist, Colored scatterplot of the first 2^15 terms (where the color is function of the 2-adic valuation of n)
EXAMPLE
See Links section.
PROG
(C++) See Links section.
CROSSREFS
KEYWORD
nonn,look
AUTHOR
STATUS
approved