Wedderburn–Etherington number
sequence of numbers counting certain kinds of binary trees
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Wedderburn–Etherington number
Summary
Wedderburn–Etherington number is an integer sequence[1]. It draws 25 Wikipedia views per month (integer_sequence category, ranking #17 of 30).[2]
Key Facts
- Wedderburn–Etherington number's instance of is recorded as integer sequence[3].
- Wedderburn–Etherington number's subclass of is recorded as non-negative integer[4].
- Wedderburn–Etherington number's Freebase ID is recorded as /m/03vlsc[5].
- Wedderburn–Etherington number's OEIS ID is recorded as A001190[6].
- Wedderburn–Etherington number's defining formula is recorded as a_{2n-1}=\sum_{i=1}^{n-1} a_i a_{2n-i-1};a_{2n}=\frac{a_n(a_n+1)}{2}+\sum_{i=1}^{n-1} a_i a_{2n-i}[7].
- Wedderburn–Etherington number's maintained by WikiProject is recorded as WikiProject Mathematics[8].
Why It Matters
Wedderburn–Etherington number draws 25 Wikipedia views per month (integer_sequence category, ranking #17 of 30).[2] It has Wikipedia articles in 5 language editions, a strong signal of global cultural recognition.[9]