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A131817
a(n) = A051340(n) + A130321(n) - A000012(n).
1
1, 2, 2, 4, 2, 3, 8, 4, 2, 4, 16, 8, 4, 2, 5, 32, 16, 8, 4, 2, 6, 64, 32, 16, 8, 4, 2, 7, 128, 64, 32, 16, 8, 4, 2, 8, 256, 128, 64, 32, 16, 8, 4, 2, 9, 512, 256, 128, 64, 32, 16, 8, 4, 2, 10, 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 11, 2048, 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 12
OFFSET
0,2
LINKS
Michael De Vlieger, Table of n, a(n) for n = 0..11475 (rows 0 <= n <= 150, flattened)
FORMULA
A051340 + A130321 - A000012 as infinite lower triangular matrices.
EXAMPLE
First few rows of the triangle:
1;
2, 2;
4, 2, 3;
8, 4, 2, 4;
16, 8, 4, 2, 5;
32, 16, 8, 4, 2, 6;
64, 32, 16, 8, 4, 2, 7;
...
MATHEMATICA
Array[Append[ConstantArray[1, # - 1], #] + 2^Range[# - 1, 0, -1] - 1 &, 12] // Flatten (* Michael De Vlieger, Aug 19 2021 *)
CROSSREFS
Cf. A051340, A083706 (row sums), A130321.
Sequence in context: A130860 A161535 A138785 * A214430 A138232 A248913
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jul 18 2007
EXTENSIONS
More terms from Jinyuan Wang, Aug 19 2021
STATUS
approved