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 1-8 of 8 results.

A231193 Number of (n+1)X(2+1) 0..2 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..2 introduced in row major order.

Original entry on oeis.org

67, 1413, 31665, 704428, 15698874, 349736292, 7791727354, 173590087438, 3867375772894, 86160416104014, 1919549013278026, 42765211455425302, 952756766481301782, 21226259035646084422, 472895169574435473198
Offset: 1

Views

Author

R. H. Hardin, Nov 05 2013

Keywords

Comments

Column 2 of A231199

Examples

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

Formula

Empirical: a(n) = 22*a(n-1) +7*a(n-2) -24*a(n-3) +218*a(n-4) -1474*a(n-5) -4420*a(n-6) +892*a(n-7) +1572*a(n-8) +5428*a(n-9) +124572*a(n-10) +179816*a(n-11) -55176*a(n-12) -492608*a(n-13) -667584*a(n-14) -56192*a(n-15) +368640*a(n-16) +246784*a(n-17) -61440*a(n-18)

A231192 Number of (n+1) X (1+1) 0..2 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..2 introduced in row major order.

Original entry on oeis.org

9, 67, 538, 4264, 33868, 268936, 2135636, 16959144, 134673104, 1069443392, 8492483984, 67439085424, 535535922336, 4252707792768, 33770887846016, 268175694518400, 2129591719896640, 16911155582525312, 134292024365242368
Offset: 1

Views

Author

R. H. Hardin, Nov 05 2013

Keywords

Examples

			Some solutions for n=5:
..0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..0....0..1
..2..2....2..2....2..2....1..0....1..0....2..2....0..1....2..0....1..2....1..2
..0..0....0..0....2..0....2..0....0..0....0..2....0..0....2..0....2..0....1..2
..2..1....2..1....0..2....1..2....2..1....2..0....2..2....0..2....1..0....1..0
..0..0....1..0....2..0....2..2....2..2....0..2....0..0....0..2....0..2....0..1
..2..2....2..2....1..0....1..0....0..0....0..2....1..1....1..0....0..2....2..1
		

Crossrefs

Column 1 of A231199.

Formula

Empirical: a(n) = 8*a(n-1) - 4*a(n-3) + 4*a(n-4) - 12*a(n-5) - 16*a(n-6).
Empirical g.f.: x*(9 - 5*x + 2*x^2 - 4*x^3 - 12*x^4 - 16*x^5) / (1 - 8*x + 4*x^3 - 4*x^4 + 12*x^5 + 16*x^6). - Colin Barker, Sep 27 2018

A231194 Number of (n+1)X(3+1) 0..2 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..2 introduced in row major order.

Original entry on oeis.org

538, 31665, 2001156, 125862699, 7925306181, 498915418541, 31409217221246, 1977358522670046, 124484128282635828, 7836867646402697860, 493368077989496076512, 31059866158795282895038, 1955366244648665136009175
Offset: 1

Views

Author

R. H. Hardin, Nov 05 2013

Keywords

Comments

Column 3 of A231199

Examples

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

Formula

Empirical recurrence of order 62 (see link above)

A231195 Number of (n+1)X(4+1) 0..2 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..2 introduced in row major order.

Original entry on oeis.org

4264, 704428, 125862699, 22370911245, 3979620300917, 707803712206189, 125892415174551558, 22391569075662818290, 3982627930521614647315, 708361425329705412880576, 125991160629687319925416882
Offset: 1

Views

Author

R. H. Hardin, Nov 05 2013

Keywords

Comments

Column 4 of A231199

Examples

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

A231196 Number of (n+1)X(5+1) 0..2 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..2 introduced in row major order.

Original entry on oeis.org

33868, 15698874, 7925306181, 3979620300917, 2000159147569783, 1005095606724544160, 505085343218758535024, 253817036845579765653637, 127548983317844250413130149, 64096334744340574731186165936
Offset: 1

Views

Author

R. H. Hardin, Nov 05 2013

Keywords

Comments

Column 5 of A231199

Examples

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

A231197 Number of (n+1)X(6+1) 0..2 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..2 introduced in row major order.

Original entry on oeis.org

268936, 349736292, 498915418541, 707803712206189, 1005095606724544160, 1426979668861283669236, 2026014594694331509708275, 2876511400864886545781053733, 4084038359532702954323652011183
Offset: 1

Views

Author

R. H. Hardin, Nov 05 2013

Keywords

Comments

Column 6 of A231199

Examples

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

A231191 Number of (n+1) X (n+1) 0..2 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..2 introduced in row major order.

Original entry on oeis.org

9, 1413, 2001156, 22370911245, 2000159147569783, 1426979668861283669236, 8127101616666745550335206754
Offset: 1

Views

Author

R. H. Hardin, Nov 05 2013

Keywords

Examples

			Some solutions for n=2:
..0..1..2....0..0..1....0..1..2....0..0..1....0..1..1....0..1..2....0..1..2
..0..0..1....2..1..0....0..0..2....1..1..0....2..0..0....1..0..1....0..2..0
..2..0..2....0..2..1....1..0..2....0..2..1....1..1..0....1..0..0....0..2..1
		

Crossrefs

Diagonal of A231199.

A231198 Number of (n+1)X(7+1) 0..2 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..2 introduced in row major order.

Original entry on oeis.org

2135636, 7791727354, 31409217221246, 125892415174551558, 505085343218758535024, 2026014594694331509708275, 8127101616666745550335206754
Offset: 1

Views

Author

R. H. Hardin, Nov 05 2013

Keywords

Comments

Column 7 of A231199

Examples

			Some solutions for n=1
..0..0..0..1..1..2..2..0....0..0..0..1..0..1..0..0....0..0..0..1..0..0..2..1
..1..1..1..0..0..1..2..1....1..1..2..1..1..0..2..2....2..2..1..1..0..1..1..0
		
Showing 1-8 of 8 results.