OFFSET
1,1
COMMENTS
Numbers of the form i! + j! where i > j > 0. - Altug Alkan, Mar 23 2018
Primes in this sequence are A088332(n) for n > 1.
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..10000
EXAMPLE
+ | 1 2 6 24
----+--------------------
1 |
2 | 3;
6 | 7, 8;
24 | 25, 26, 30;
120 | 121, 122, 126, 144;
MATHEMATICA
Union[Total/@Subsets[Range[10]!, {2}]] (* Harvey P. Dale, Aug 25 2020 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Mar 23 2018
STATUS
approved