OFFSET
1,2
LINKS
J. M. Gandhi, On logarithmic numbers, Math. Student, 31 (1963), 73-83. Gives first 10 rows. [Annotated scanned copy]
EXAMPLE
Triangle begins:
1,
3,2,
8,6,6,
24,24,24,24,
89,80,60,120,120,
415,450,480,360,720,720,
2372,2142,2730,840,2520,5040,5040,
...
MAPLE
A260323 := proc(n, r)
if r = 0 then
1 ;
elif n > r+1 then
0 ;
else
add( 1/(r-j*n)!/j, j=1..(r)/n) ;
%*r! ;
end if;
end proc:
for r from 1 to 20 do
for n from 1 to r do
printf("%a, ", A260323(n, r)) ;
end do:
printf("\n") ;
end do: # R. J. Mathar, Jul 24 2015
MATHEMATICA
T[n_, k_] := If[n == 0, 1, If[k > n+1, 0, Sum[1/(n - j*k)!/j, {j, 1, n/k}]]]*n!;
Table[T[n, k], {n, 1, 10}, {k, 1, n}] // Flatten (* Jean-François Alcover, Jun 25 2023, after R. J. Mathar *)
CROSSREFS
KEYWORD
sign,tabl
AUTHOR
N. J. A. Sloane, Jul 23 2015
STATUS
approved