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.

A189653 Number of 5Xn array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally.

This page as a plain text file.
%I A189653 #7 Jul 22 2025 11:52:09
%S A189653 1,450,17655,2631821,250758892,30010432933,3292827578005,
%T A189653 376678790309002,42358721253919843,4801283687544580305,
%U A189653 542386040165423966236,61365524584279523157641,6938297347463763255984633
%N A189653 Number of 5Xn array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally.
%C A189653 Row 5 of A189650
%H A189653 R. H. Hardin, <a href="/A189653/b189653.txt">Table of n, a(n) for n = 1..200</a>
%F A189653 Empirical: a(n) = 107*a(n-1) +4303*a(n-2) -406534*a(n-3) -4329464*a(n-4) +466840808*a(n-5) +1338922608*a(n-6) -227992823136*a(n-7) +90951697440*a(n-8) +53386064289152*a(n-9) -108406327693184*a(n-10) -5771603989188608*a(n-11) +11703591191155200*a(n-12) +172452239709961728*a(n-13) +1498301110046938112*a(n-14) +14910534867774803968*a(n-15) -369954950790874443776*a(n-16) -1122779731327948267520*a(n-17) +27415171459521008320512*a(n-18) +13113077428590656225280*a(n-19) -948436399977700515119104*a(n-20) +718072262953029442207744*a(n-21) +15306605215443650927919104*a(n-22) -23785626604164302597783552*a(n-23) -63183460656377361227317248*a(n-24) +336913590202586242004025344*a(n-25) -1367838179233684601582911488*a(n-26) -4565130350432220898859679744*a(n-27) +19045513342601064393182543872*a(n-28) +60860396016352702310591234048*a(n-29) -56998115344223218475739381760*a(n-30) -453823691284753050683438006272*a(n-31) -393736729027557466236264644608*a(n-32) +1251233979672582675419566702592*a(n-33) +2823288040816995497010406621184*a(n-34) +1031231653598246771565784989696*a(n-35) -4399440162748647480754025005056*a(n-36) -7005172700570647534593105723392*a(n-37) -5260712228450985579008097255424*a(n-38) +2261097267196132807937693319168*a(n-39) +15111807638739449523277750337536*a(n-40) +13977227635584971692638723899392*a(n-41) +9954649350974934287262941184000*a(n-42) -14775252650126481676321748418560*a(n-43) -9222257769877287745000803663872*a(n-44) -9509714054063086127993984122880*a(n-45) -10587625049850095971602849071104*a(n-46) -2743801275209083294223179972608*a(n-47) -6363253539914382491808868335616*a(n-48) +1802733977560574408772213014528*a(n-49) +613085944850739567921947738112*a(n-50) -58537072347407169574936772608*a(n-51) +18124814447614224314725826560*a(n-52) +3190355237963006392049598464*a(n-53)
%e A189653 Some solutions for 5X3
%e A189653 ..0..2..1....0..3..4....0..3..2....0..2..4....0..1..2....4..1..2....0..3..4
%e A189653 ..3..6..5....1..2..5....1..5..4....1..6..5....3..4..5....3..0..5....1..2..7
%e A189653 ..4.11..8....6..9.10...10..6..7...10..3..8....7..6..8....6..8..7....6..5..8
%e A189653 ..9.14..7....7..8.13...13..8.11....9.12..7....9.11.10...13.10.11...10.12.11
%e A189653 .10.12.13...12.11.14...12..9.14...13.11.14...12.13.14...12..9.14...13..9.14
%K A189653 nonn
%O A189653 1,2
%A A189653 _R. H. Hardin_ Apr 24 2011