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.

Showing 1-3 of 3 results.

A206957 T(n,k)=Number of nXk 0..2 arrays avoiding the pattern z z+1 z in any row, column or nw-to-se diagonal.

Original entry on oeis.org

3, 9, 9, 25, 81, 25, 69, 625, 625, 69, 191, 4761, 11804, 4761, 191, 529, 36481, 218637, 218637, 36481, 529, 1465, 279841, 4107593, 9803278, 4107593, 279841, 1465, 4057, 2146225, 77359677, 449797912, 449797912, 77359677, 2146225, 4057, 11235
Offset: 1

Views

Author

R. H. Hardin Feb 13 2012

Keywords

Comments

Table starts
....3........9..........25.............69...............191
....9.......81.........625...........4761.............36481
...25......625.......11804.........218637...........4107593
...69.....4761......218637........9803278.........449797912
..191....36481.....4107593......449797912.......50967712088
..529...279841....77359677....20694430627.....5791955969105
.1465..2146225..1455935650...950821989599...656572043220119
.4057.16459249.27394495918.43676385937074.74406813170700252

Examples

			Some solutions for n=4 k=3
..0..0..2....2..2..1....1..2..2....1..0..1....0..1..2....2..2..1....2..2..2
..0..0..2....2..0..2....0..0..1....2..0..2....1..2..0....2..0..0....1..2..2
..0..0..0....2..2..0....1..2..0....0..2..2....1..2..0....2..0..0....0..2..2
..1..2..0....0..2..1....1..2..2....2..0..2....2..0..2....2..2..2....0..0..2

Links

Crossrefs

Column 1 is A098182(n+1)
Column 2 is A206857

A207221 T(n,k)=Number of nXk 0..2 arrays avoiding the pattern z z+1 z in any row or column.

Original entry on oeis.org

3, 9, 9, 25, 81, 25, 69, 625, 625, 69, 191, 4761, 12534, 4761, 191, 529, 36481, 247163, 247163, 36481, 529, 1465, 279841, 4916282, 12584703, 4916282, 279841, 1465, 4057, 2146225, 97935886, 647820815, 647820815, 97935886, 2146225, 4057, 11235
Offset: 1

Views

Author

R. H. Hardin Feb 16 2012

Keywords

Comments

Table starts
....3........9..........25.............69................191
....9.......81.........625...........4761..............36481
...25......625.......12534.........247163............4916282
...69.....4761......247163.......12584703..........647820815
..191....36481.....4916282......647820815........86510224720
..529...279841....97935886....33403462497.....11574609426324
.1465..2146225..1950327875..1721695415743...1547869995556777
.4057.16459249.38835489653.88730578258613.206971107381598775

Examples

			Some solutions for n=4 k=3
..2..0..1....1..2..2....2..2..0....2..0..2....1..1..2....2..1..0....2..1..2
..2..0..2....0..0..1....0..0..2....1..1..1....1..1..1....2..1..2....1..2..2
..2..0..2....1..2..0....2..0..0....1..1..0....0..1..2....2..1..1....0..2..1
..2..0..1....1..2..2....1..0..1....1..2..2....2..1..2....0..1..1....1..1..2

Links

Crossrefs

Column 1 is A098182(n+1)
Column 2 is A206857

A207989 T(n,k)=Number of nXk 0..2 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically.

Original entry on oeis.org

3, 9, 9, 25, 81, 25, 69, 625, 625, 69, 191, 4761, 12468, 4761, 191, 529, 36481, 244325, 244325, 36481, 529, 1465, 279841, 4827482, 12271227, 4827482, 279841, 1465, 4057, 2146225, 95527856, 622569385, 622569385, 95527856, 2146225, 4057, 11235
Offset: 1

Views

Author

R. H. Hardin Feb 22 2012

Keywords

Comments

Table starts
....3........9..........25.............69................191
....9.......81.........625...........4761..............36481
...25......625.......12468.........244325............4827482
...69.....4761......244325.......12271227..........622569385
..191....36481.....4827482......622569385........81269646503
..529...279841....95527856....31638012071.....10629041648848
.1465..2146225..1889730415..1607243845009...1389619561706920
.4057.16459249.37378616643.81641053794111.181656690367717549

Examples

			Some solutions for n=4 k=3
..2..2..0....2..1..0....1..2..2....2..1..0....0..0..0....2..1..2....1..2..2
..0..0..2....2..1..2....0..0..1....0..1..1....2..0..2....1..2..2....2..1..2
..2..0..0....2..1..1....2..2..0....1..0..2....2..0..1....0..2..1....2..0..1
..1..0..1....0..1..1....1..2..2....1..2..2....0..0..0....2..1..0....2..2..1

Links

Crossrefs

Column 1 is A098182(n+1)
Column 2 is A206857
Showing 1-3 of 3 results.

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