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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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A202962 T(n,k)=Number of arrays of n+2 integers in -k..k with sum zero and adjacent elements differing in absolute value.

Original entry on oeis.org

2, 6, 4, 20, 28, 2, 36, 108, 82, 0, 62, 268, 414, 200, 6, 90, 544, 1562, 1936, 524, 12, 128, 972, 4048, 9884, 9872, 1724, 6, 168, 1576, 9010, 33736, 66208, 47732, 5908, 0, 218, 2392, 17296, 90604, 289536, 447528, 229714, 18340, 20, 270, 3456, 30648, 207184
Offset: 1

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Author

R. H. Hardin Dec 26 2011

Keywords

Comments

Table starts
..2......6.......20........36..........62...........90..........128
..4.....28......108.......268.........544..........972.........1576
..2.....82......414......1562........4048.........9010........17296
..0....200.....1936......9884.......33736........90604.......207184
..6....524.....9872.....66208......289536.......941086......2537024
.12...1724....47732....447528.....2475008......9824176.....31155004
..6...5908...229714...3020170....21274708....102972822....384996502
..0..18340..1134036..20430512...184258272...1085236504...4786979780
.20..53680..5624396.139027620..1602929218..11493823804..59791891464
.40.162080.27808428.950710524.13990833912.122199247152.749603860520

Examples

			Some solutions for n=5 k=3
..1....2....2....0...-1...-3....0....1....1....2....1....0...-3....1....2....2
.-3...-3....0...-3....0...-2....2...-3....0....3....3....1....1...-2....0...-3
..0...-1...-1...-1...-1....0...-1...-1...-1....2...-1....2....3...-1...-1....0
.-1....0....3....0....2....2....0...-3...-2...-3....2...-3...-1...-3....0....1
..2...-2...-2....3...-3....1...-3....1....3...-1...-3....2....2....2....1....2
..3....1...-3....1....2....2...-1....2...-1...-3...-2...-3....0....1...-2....1
.-2....3....1....0....1....0....3....3....0....0....0....1...-2....2....0...-3

Links

Crossrefs

Column 1 is A202069
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