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A118911
Row sums of triangle in A128973.
1
1, 1, 3, 3, 3, 3, 5, 5, 3, 3, 9, 9, 5, 5, 11, 11, 3, 3, 9, 9, 9, 9, 15, 15, 5, 5, 15, 15, 11, 11, 21, 21, 3, 3, 9, 9, 9, 9, 15, 15, 9, 9, 27, 27, 15, 15, 33, 33, 5, 5, 15, 15, 15, 15, 25, 25, 11, 11, 33, 33, 21, 21, 43, 43, 3, 3, 9, 9, 9, 9, 15, 15, 9, 9, 27, 27, 15, 15, 33, 33, 9, 9
OFFSET
0,3
COMMENTS
Integers in A071053 repeated.
FORMULA
a(2*n) = a(2*n+1).
a(n) = Sum_{k=0..n} A128973(n,k).
a(2^k+m) = 3*a(m) for 0 <= m <= 2^(k-1) - 1, k >= 1.
a(4*n) = a(2*n) = A071053(n).
CROSSREFS
Sequence in context: A125713 A332323 A162220 * A190268 A111756 A130821
KEYWORD
nonn
AUTHOR
Philippe Deléham, May 02 2007, Jan 06 2008
EXTENSIONS
a(48) and following terms corrected by Georg Fischer, Jul 04 2023
STATUS
approved