cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A320623 Number of ordered set partitions of [n] where k = ten is minimal such that for each block b the smallest integer interval containing b has at most k elements.

Original entry on oeis.org

7087261, 183779178, 3762089520, 72416697816, 1384785261888, 26933164023936, 538943434056240, 11161053068862792, 239918736073504524, 5377267055166042184, 125874638274228457172, 3067862283177425632176, 77667019131362612168256, 2038671040407878313592224
Offset: 10

Views

Author

Alois P. Heinz, Oct 17 2018

Keywords

Crossrefs

Column k=10 of A276891.
Cf. A320560.

A276892 Number of ordered set partitions of [2n] where k=n is minimal such that for each block b the smallest integer interval containing b has at most k elements.

Original entry on oeis.org

1, 2, 20, 878, 79682, 12043772, 2716968332, 853336081124, 355520118746132, 189580735777428836, 125874638274228457172, 101804159684084842005380, 98514573603328714169588852, 112376135259125932230989633060, 149216698787792363945310009639572
Offset: 0

Views

Author

Alois P. Heinz, Sep 21 2016

Keywords

Crossrefs

Formula

a(n) = A276891(2n,n).

A320615 Number of ordered set partitions of [n] where k = two is minimal such that for each block b the smallest integer interval containing b has at most k elements.

Original entry on oeis.org

1, 4, 20, 114, 750, 5616, 47304, 443400, 4582200, 51790320, 635791680, 8426915280, 119960552880, 1825701857280, 29585590473600, 508653914267520, 9248148480574080, 177303557272262400, 3574966680853747200, 75628468328518828800, 1675003757666567328000
Offset: 2

Views

Author

Alois P. Heinz, Oct 17 2018

Keywords

Crossrefs

Column k=2 of A276891.
Previous Showing 11-13 of 13 results.