#sequences

[arcadebroke]

[wouldwind]

Imprint (a Venn Diagram) | Empreinte (un diagramme de Venn)

[boredphysicsstudent]

A fun thing I found on the OEIS (online encyclopedia of integer sequences):

Suppose you have a sequence like

1,2,2,3,3,3,4,4,4,4…

The pattern is “each number n appears n times”. You can make this sequence in a very unexpected way with squareroots.

If you round sqrt(2x) to the nearest whole numbers, you also get the same sequence!

[waitingformyfool]

[oneefin]

poll contains spoilers for deltarune chapters 3 + 4

best ordered quartet that starts with "king" and "queen"

king, queen, prince, princess

king, queen, jack, ten

king, queen, bishop, knight

king, queen, full, twin

king, queen, tenna, gerson

(something else)

[show results]

Voting ended onJun 23, 2025

[giftofgabber]

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[elation0]

A112798: Table where n-th row is factorization of n, with each prime p_i replaced by i. vs A122111: Self-inverse permutation of the positive integers induced by partition enumeration in A112798 and partition conjugation.