OFFSET
1,1
COMMENTS
Column 3 of A223467
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 751*a(n-2) -213977*a(n-4) +30621250*a(n-6) -2460992507*a(n-8) +119254462102*a(n-10) -3670996485078*a(n-12) +75009157476789*a(n-14) -1056588922332331*a(n-16) +10576074147463216*a(n-18) -76959427833100718*a(n-20) +413739436651265546*a(n-22) -1660689308745581771*a(n-24) +5005542176662370394*a(n-26) -11348860916160032402*a(n-28) +19319641870299497561*a(n-30) -24574099114255799068*a(n-32) +23182072953460411397*a(n-34) -16063563012586221221*a(n-36) +8081476839997677366*a(n-38) -2910695207618822958*a(n-40) +737493263291407444*a(n-42) -128540692908762460*a(n-44) +14965848663295632*a(n-46) -1117954806914792*a(n-48) +50415617089984*a(n-50) -1228263380544*a(n-52) +12208371840*a(n-54) for n>55
EXAMPLE
Some solutions for n=3
.17.12..7....6.11.17....4..1..0....2..5..8....4..2..5....5..8.13...11..6.10
.11..7..3...11..7.11....2..4..1....0..2..4....8..4..8....8.12..8....6.10..6
..7..3..1...17.11..7....4..1..3....1..0..1....5..2..4....5..8..5...10.16.10
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 20 2013
STATUS
approved