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A329310
a(n) is the sum of the numbers k such that a(n-2*k) = a(n-k) and 0 < n-2*k < n-k < n.
2
0, 0, 1, 0, 0, 3, 3, 4, 4, 1, 0, 0, 1, 0, 0, 6, 16, 10, 11, 17, 10, 10, 31, 13, 10, 27, 13, 16, 18, 3, 0, 7, 0, 0, 3, 0, 3, 2, 16, 5, 5, 1, 0, 7, 0, 0, 19, 17, 3, 37, 38, 28, 52, 74, 34, 55, 82, 61, 27, 53, 132, 29, 71, 90, 32, 32, 95, 82, 0, 34, 92, 29, 0, 63
OFFSET
1,6
EXAMPLE
The first terms, alongside the corresponding k's, are:
n a(n) k's
--- ---- ---------
1 0 {}
2 0 {}
3 1 {1}
4 0 {}
5 0 {}
6 3 {1, 2}
7 3 {3}
8 4 {1, 3}
9 4 {4}
10 1 {1}
11 0 {}
12 0 {}
13 1 {1}
14 0 {}
15 0 {}
16 6 {1, 2, 3}
17 16 {3, 6, 7}
PROG
(C) See Links section.
CROSSREFS
See A329257 for similar sequences.
Sequence in context: A343443 A351348 A246011 * A061023 A355954 A057690
KEYWORD
nonn
AUTHOR
Rémy Sigrist, Nov 10 2019
STATUS
approved