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.

A229929 Number of nX3 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value 2-x(i,j).

Original entry on oeis.org

3, 115, 1889, 33119, 575757, 10015447, 174306687, 3033162257, 52780116071, 918441159087, 15982039040815, 278107289563015, 4839412932483379, 84211817278578727, 1465390522949952937, 25499620386183396001
Offset: 1

Views

Author

R. H. Hardin, Oct 04 2013

Keywords

Comments

Column 3 of A229934

Examples

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

Formula

Empirical: a(n) = 17*a(n-1) -35*a(n-2) +714*a(n-3) -186*a(n-4) +7255*a(n-5) +20662*a(n-6) -64966*a(n-7) +84269*a(n-8) +187347*a(n-9) -322147*a(n-10) -628502*a(n-11) -1841129*a(n-12) +1612168*a(n-13) +1569555*a(n-14) +6807437*a(n-15) +4484863*a(n-16) -10256653*a(n-17) -6172407*a(n-18) -30616026*a(n-19) +24692244*a(n-20) -26449944*a(n-21) +78202441*a(n-22) -22109082*a(n-23) +88650916*a(n-24) -93802931*a(n-25) +32432730*a(n-26) -90623604*a(n-27) +31406227*a(n-28) -43230346*a(n-29) +32065489*a(n-30) -12064122*a(n-31) +4898739*a(n-32) -6961489*a(n-33) -2339302*a(n-34) -1481520*a(n-35) -123582*a(n-36) +105456*a(n-37) +41286*a(n-38) -230321*a(n-39) +22096*a(n-40) -50268*a(n-41) -10864*a(n-42) -6264*a(n-43) -2368*a(n-44) +856*a(n-45) -680*a(n-46) +404*a(n-47) -32*a(n-48) -80*a(n-49) for n>50