OFFSET
1,4
REFERENCES
F. Luca, A. O. Munagi, The Number Of Permutations Which Form Arithmetic Progressions Modulo m, Annals of the Alexandru Ioan Cuza University, 2014, DOI: 10.2478/aicu-2014-0053
EXAMPLE
Triangle begins:
1,1,1,
2,2,2,2,
6,2,6,2,2,
24,8,4,8,4,2,
120,12,8,4,20,2,2,
720,72,48,8,8,12,6,2,
5040,144,48,16,8,4,42,4,2,
40320,1152,144,128,16,8,12,23,6,2,
362880,2880,1296,96,64,16,8,8,54,4,2,
...
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
N. J. A. Sloane, Sep 07 2015
STATUS
approved