Irregular triangle read by rows: T(n,k) is the number of elements of alternating group A_n having order k, for n >= 1, 1 <= k <= A051593(n).
A057740
Irregular triangle read by rows: T(n,k) is the number of elements of alternating group A_n having order k, for n >= 1, 1 <= k <= A051593(n).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =0a(4) =2a(5) =1a(6) =3a(7) =8a(8) =1a(9) =15a(10) =20a(11) =0a(12) =24a(13) =1a(14) =45a(15) =80a(16) =90a(17) =144a(18) =1a(19) =105a(20) =350a(21) =630a(22) =504a(23) =210a(24) =720a(25) =1a(26) =315a(27) =1232a(28) =3780a(29) =1344
External references
- oeis: A057740