A247336 Numbers of the form m^k - k - 1 with k > 0 and m > 1.

0, 1, 4, 6, 11, 13, 22, 23, 26, 33, 46, 57, 60, 61, 76, 78, 97, 118, 120, 121, 141, 166, 193, 212, 222, 237, 247, 251, 253, 286, 321, 339, 358, 397, 438, 481, 502, 508, 526, 573, 620, 622, 673, 722, 725, 726, 781, 838, 897, 958, 996, 1013, 1018, 1021, 1086, 1153

Offset: 1

Author

Juri-Stepan Gerasimov, Sep 13 2014

Keywords

• nonn
• easy

Comments

Primes in a(n): 11, 13, 23, 61, 97, 193, 251, 397, 673, 1013, 1021, 1153, ...

Examples

			0 is in this sequence because 2^1 - 1 - 1 = 0,
1 is in this sequence because 2^2 - 2 - 1 = 1.
		

Crossrefs

Cf. A057897, A099226, A099228.

Formula

a(n + 1) = A057897(n) - 1.