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URL: https://oeis.org/history?seq=A390603

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Showing entries 1-10 | older changes
Number of closed binary operations on n labeled elements satisfying (xy)z = xy identically.
#30 by OEIS Server at Sun Nov 23 05:45:15 EST 2025
LINKS
#29 by Michel Marcus at Sun Nov 23 05:45:15 EST 2025
STATUS
Discussion
Sun Nov 23
05:45
OEIS Server: Installed first b-file as b390603.txt.
#28 by Joerg Arndt at Sun Nov 23 03:58:13 EST 2025
STATUS
#27 by Andrew Howroyd at Sat Nov 22 17:05:53 EST 2025
STATUS
#26 by Paolo Xausa at Sat Nov 22 17:05:04 EST 2025
FORMULA
#25 by Paolo Xausa at Sat Nov 22 17:00:35 EST 2025
LINKS
MATHEMATICA
Discussion
Sat Nov 22
17:03
Paolo Xausa: Sure, done. I'll leave it to you to propose/approve.
#24 by Andrew Howroyd at Sat Nov 22 16:55:31 EST 2025
FORMULA
PROG
Discussion
Sat Nov 22
16:56
Andrew Howroyd: Sorry for the repeated edits! If we make the summation range from 0, we don't need a special case not n=0, assuming the usual 0^0 conventions.
#23 by Andrew Howroyd at Sat Nov 22 16:49:46 EST 2025
CROSSREFS
#22 by Andrew Howroyd at Sat Nov 22 16:47:23 EST 2025
FORMULA
PROG
CROSSREFS
#21 by Andrew Howroyd at Sat Nov 22 16:45:21 EST 2025
DATA
Discussion
Sat Nov 22
16:46
Andrew Howroyd: Paolo, you got to this before me.... Can you change b-file to be a(0)=1, and the code?