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.

A269107 Number of nX6 0..3 arrays with some element plus some horizontally or vertically adjacent neighbor totalling three no more than once.

Original entry on oeis.org

2592, 1090740, 342055548, 95166487524, 24808345933548, 6206909793496236, 1509593256271433868, 359627971978314972756, 84330282164848323860700, 19529981463869576058830652, 4477577440675705031339912748
Offset: 1

Views

Author

R. H. Hardin, Feb 19 2016

Keywords

Comments

Column 6 of A269109.

Examples

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

Crossrefs

Cf. A269109.

Formula

Empirical: a(n) = 624*a(n-1) -148392*a(n-2) +17707654*a(n-3) -1237692774*a(n-4) +55270649556*a(n-5) -1656470723141*a(n-6) +34132157660412*a(n-7) -484096890617541*a(n-8) +4569992373952272*a(n-9) -25146261177957786*a(n-10) +25694778316842858*a(n-11) +756190434082200840*a(n-12) -6052462771631752224*a(n-13) +18126128855859433455*a(n-14) +18664609483184919500*a(n-15) -342070453287924453888*a(n-16) +1141375792492508055684*a(n-17) -1231488788816842507708*a(n-18) -2418565901590843869576*a(n-19) +9095171580512370570684*a(n-20) -8677540039273932904920*a(n-21) -4965678440542161492372*a(n-22) +17155105764294227912496*a(n-23) -13588702943203699236720*a(n-24) +4184136771765648014016*a(n-25) -441364595341874186304*a(n-26) for n>27