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 1-7 of 7 results.

A278383 Number of nX6 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

Original entry on oeis.org

1, 1350, 100807, 4703562, 179716850, 6204309386, 198563803019, 5851197688577, 157794170262819, 3912513274701995, 90233123783207419, 1960361831058212555, 40518771843257636636, 801152317698519068308, 15177259705860270641696
Offset: 1

Views

Author

R. H. Hardin, Nov 20 2016

Keywords

Comments

Column 6 of A278385.

Examples

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

Crossrefs

Cf. A278385.

A278379 Number of n X 2 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

Original entry on oeis.org

0, 0, 3, 40, 267, 1350, 5936, 23565, 84912, 278422, 835824, 2316601, 5980937, 14503972, 33282396, 72732358, 152195016, 306378420, 595704701, 1122541470, 2056128263, 3670127802, 6398217740, 10915088955, 18252749400, 29965289850
Offset: 1

Views

Author

R. H. Hardin, Nov 20 2016

Keywords

Comments

Column 2 of A278385.

Examples

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

Crossrefs

Cf. A278385.

Formula

Empirical: a(n) = (1/1307674368000)*n^15 + (1/12454041600)*n^14 + (149/37362124800)*n^13 + (31/319334400)*n^12 + (1517/1306368000)*n^11 + (169/87091200)*n^10 - (73537/1828915200)*n^9 - (3971/87091200)*n^8 + (2939219/653184000)*n^7 + (521/2419200)*n^6 - (1516673/44906400)*n^5 - (19007/59875200)*n^4 + (351393113/4540536000)*n^3 + (3149/21621600)*n^2 - (5/104)*n.

A278380 Number of nX3 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

Original entry on oeis.org

0, 3, 74, 1220, 12910, 100807, 652343, 3750182, 19784428, 96786947, 439906101, 1859501560, 7328752206, 27039030100, 93829708460, 307762056698, 958683800155, 2848583303210, 8105942966932, 22169003715353, 58456685214757
Offset: 1

Views

Author

R. H. Hardin, Nov 20 2016

Keywords

Comments

Column 3 of A278385.

Examples

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

Crossrefs

Cf. A278385.

Formula

Empirical polynomial of degree 31 (see link above)

A278381 Number of nX4 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

Original entry on oeis.org

0, 40, 1220, 23640, 368421, 4703562, 50473056, 474255829, 4047341159, 32112086692, 239321493757, 1678998378973, 11080464577870, 68753466828933, 401430915176013, 2209957957528646, 11503598362204972, 56799460197673429
Offset: 1

Views

Author

R. H. Hardin, Nov 20 2016

Keywords

Comments

Column 4 of A278385.

Examples

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

Crossrefs

Cf. A278385.

Formula

Empirical polynomial of degree 63 (see link above)

A278382 Number of nX5 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

Original entry on oeis.org

0, 267, 12910, 368421, 8632118, 179716850, 3325788157, 54735436424, 813247916326, 11132424779200, 142827255320422, 1735129660080135, 20034300716422826, 219810810847095930, 2288305542134926763
Offset: 1

Views

Author

R. H. Hardin, Nov 20 2016

Keywords

Comments

Column 5 of A278385.

Examples

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

Crossrefs

Cf. A278385.

Formula

Empirical polynomial of degree 127 (see link above)

A278384 Number of nX7 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

Original entry on oeis.org

8, 5936, 652343, 50473056, 3325788157, 198563803019, 11105331450864, 586395701904408, 29015321337746085, 1335864857344408243, 57236190892283185233, 2296849324984530935992, 87126825773953105905476
Offset: 1

Views

Author

R. H. Hardin, Nov 20 2016

Keywords

Comments

Column 7 of A278385.

Examples

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

Crossrefs

Cf. A278385.

A278378 Number of n X n 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

Original entry on oeis.org

0, 0, 74, 23640, 8632118, 6204309386, 11105331450864, 55821544343692020, 843729327193891754770, 40033544602806238643588014
Offset: 1

Views

Author

R. H. Hardin, Nov 20 2016

Keywords

Comments

Diagonal of A278385.

Examples

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

Crossrefs

Cf. A278385.
Showing 1-7 of 7 results.