A393079 First column of A392806.

0, 0, 0, 2, 0, 6, 1, 9, 0, 14, 9, 25, 0, 20, 13, 35, 0, 30, 25, 57, 11, 47, 40, 78, 0, 44, 37, 83, 19, 69, 60, 112, 0, 62, 57, 121, 43, 111, 104, 174, 7, 83, 76, 154, 58, 140, 131, 215, 0, 92, 85, 179, 67, 165, 156, 256, 23, 129, 120, 228, 98, 210, 199, 313

Offset

0,4

Comments

See also A392806 for a Python program.

Links

A.H.M. Smeets, Table of n, a(n) for n = 0..10000

Formula

a(2^k) = 0, k >= 0.

a(2*n+1) = a(2*n) + 2*Sum_{i = 1..n} A001511(i) = a(2*n) + 2*A005187(n).

a(5^(e+1)*n + 2^e) = a(2^(e+1)*n) + max(0,-A392083(e)+2^(e+1)*Sum_{i=1..n} A005187(i), e >= 0, a(0) = 0 (completely determines this sequence).

a(n) = A007814(A392805(n)).

Crossrefs

Cf. A001511, A005187, A007814, A392083, A392806.

Sequence in context: A317842 A021489 A380004 * A092158 A051831 A368377

Adjacent sequences: A393076 A393077 A393078 * A393080 A393081 A393082

Keyword

nonn

Author

A.H.M. Smeets, Feb 01 2026

Status

approved