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.

A240759 Number of nX5 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.

Original entry on oeis.org

57, 124, 553, 1750, 5325, 21859, 66809, 222091, 811643, 2448916, 9024626, 30179690, 99789149, 353161702, 1157895846, 3982409016, 13642548710, 45571813573, 157078910184, 529972106693, 1796868367572, 6142685239467, 20734748809544
Offset: 1

Views

Author

R. H. Hardin, Apr 12 2014

Keywords

Comments

Column 5 of A240760

Examples

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