A093844 n-th row of the following triangle contains n terms of an arithmetic progression with the first term 1 such that the sum is the least possible n-th power. Sequence contains the leading diagonal.

1, 3, 17, 7, 1249, 15551, 235297, 419903, 86093441, 1999999999, 51874849201, 1486016741375, 46596170244961, 1587429546508287, 58385852050781249, 8191, 97322383751333736961, 4371823119477393063935, 208254700595822483065681

Offset

1,2

Comments

1

1 3

1 9 17

1 3 5 7

1 313 625 937 1249

1 3111 6221 9331 12441 15551

Links

Table of n, a(n) for n=1..19.

Prog

(PARI) {a(n)=local(k); k=2; while(2*Mod(k, n)^n!=0||2*(Mod(k, n-1)^n-1)!=0, k++); 2*k^n/n-1} (Alekseyev)

Crossrefs

Cf. A093460, A093845.

Cf. A093845, A110500.

Sequence in context: A140446 A124689 A367877 * A273211 A273273 A273249

Adjacent sequences: A093841 A093842 A093843 * A093845 A093846 A093847

Keyword

nonn

Author

Amarnath Murthy, Apr 18 2004

Extensions

More terms from Max Alekseyev, Jul 23 2005

Status

approved