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A144644 Triangle in A144643 read by columns downwards. 1
1, 0, 1, 0, 1, 1, 0, 1, 3, 1, 0, 1, 7, 6, 1, 0, 0, 15, 25, 10, 1, 0, 0, 25, 90, 65, 15, 1, 0, 0, 35, 280, 350, 140, 21, 1, 0, 0, 35, 770, 1645, 1050, 266, 28, 1, 0, 0, 0, 1855, 6930, 6825, 2646, 462, 36, 1, 0, 0, 0, 3675, 26425, 39795, 22575, 5880, 750, 45, 1, 0, 0 (list; table; graph; refs; listen; history; internal format)
OFFSET

0,9

LINKS

David Applegate and N. J. A. Sloane, The Gift Exchange Problem (arXiv:0907.0513, 2009)

EXAMPLE

Triangle begins:

1

0,1

0,1,1

0,1,3,1

0,1,7,6,1

0,0,15,25,10,1

0,0,25,90,65,15,1

0,0,35,280,350,140,21,1

0,0,35,770,1645,1050,266,28,1

0,0,0,1855,6930,6825,2646,462,36,1

0,0,0,3675,26425,39795,22575,5880,750,45,1

0,0,0,5775,90475,211750,172095,63525,11880,1155,55,1

0,0,0,5775,275275,1033725,1198120,609840,158235,22275,1705,66,1

0,0,0,0,725725,4629625,7702695,5335330,1861860,358215,39325,2431,78,1

0,0,0,0,1576575,18918900,45965920,43158115,19899880,5060055,750750,66066,3367,91,1

0,0,0,0,2627625,69719650,254879625,325475150,196471275,64689625,12522510,1476475,106470,4550,105,1

CROSSREFS

Sequence in context: A055807 A205099 A054024 * A151509 A151511 A048993

Adjacent sequences:  A144641 A144642 A144643 * A144645 A144646 A144647

KEYWORD

nonn,tabl

AUTHOR

David Applegate and N. J. A. Sloane (njas(AT)research.att.com), Jan 25 2009

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Last modified February 17 06:27 EST 2012. Contains 205998 sequences.