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A046574
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Distinct numbers in writing first numerator and then denominator of the central elements of the 1/4-Pascal triangle (by row).
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0
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1, 4, 5, 2, 19, 35, 259, 483, 1815, 6864, 52195, 99671, 382109, 1469650, 5668327, 21915550, 84913470, 329624730, 2563431075, 4991324415, 19463777025, 75992317170, 297026449005, 1162147683450, 4551257541090, 17839099909800
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| 1/1; 1/1 1/1; 1/1 1/4 1/1; 1/1 5/4 5/4 1/1; 1/1 9/4 5/2 9/4 1/1; 1/1 13/4 19/4 19/4 13/4 1/1; 1/1 17/4 8/1 19/2 8/1 17/4 1/1; 1/1 21/4 49/4 35/2 35/2 49/4 21/4 1/1; ...
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CROSSREFS
| Cf. A046563.
Sequence in context: A019815 A200684 A046572 * A019743 A010663 A016494
Adjacent sequences: A046571 A046572 A046573 * A046575 A046576 A046577
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KEYWORD
| nonn
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AUTHOR
| Mohammad K. Azarian (ma3(AT)evansville.edu)
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EXTENSIONS
| More terms from James A. Sellers (sellersj(AT)math.psu.edu), Dec 14 1999
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