OFFSET
1,2
COMMENTS
See A373345 (where elements in each set are listed in decreasing order) for more information.
LINKS
Paolo Xausa, Table of n, a(n) for n = 1..10000 (rows 1..2261 of the triangle, flattened).
Alistair Bird, Jozef Schreier, Schreier sets and the Fibonacci sequence, Out Of The Norm blog, May 13 2012.
FORMULA
T(n,k) = A373579(n,k) - 1.
EXAMPLE
Triangle begins:
Corresponding Schreier
-------------------------------------------------------
1 1 1 {1}
2 2 10 {2}
3 4 100 {3}
4 6 110 {2, 3}
5 8 1000 {4}
6 10 1010 {2, 4}
7 12 1100 {3, 4}
8 16 10000 {5}
9 18 10010 {2, 5}
10 20 10100 {3, 5}
11 24 11000 {4, 5}
12 28 11100 {3, 4, 5}
...
MATHEMATICA
Join[{{1}}, Map[PositionIndex[Reverse[IntegerDigits[#, 2]]][1] &, Select[Range[2, 200, 2], DigitCount[#, 2, 1] <= IntegerExponent[#, 2] + 1 &]]]
CROSSREFS
KEYWORD
nonn,tabf,easy,base
AUTHOR
Paolo Xausa, Jun 04 2024
STATUS
approved