A056229 Hankel transform of Euler totient function (A000010).

1, 1, 0, -4, 64, -240, -2656, 15360, -88064, -1714176, -28506112, 59061248, 1975595008, -107448238080, 858018086912, 12209125720064, 61138306793472, -297002777247744, -7586668200067072, 309144292445913088, -20518123014457393152, -58844751529044344832, 2248491526894557069312

Offset: 1

Author

N. J. A. Sloane, Aug 06 2000

Keywords

• sign

Crossrefs

See A001906 for definition of Hankel transform.

Programs

Mathematica

a[n_]:=Det[Table[EulerPhi[i+j-1], {i, n}, {j, n}]]; Join[Array[a, 23]] (* Stefano Spezia, Feb 21 2025 *)

Extensions

a(21)-a(23) from Stefano Spezia, Feb 21 2025