A112719 Numbers m such that pi(m) = d_1^1 + d_2^2 + ... + d_k^k where d_1 d_2 ... d_k is the decimal expansion of m.

0, 12, 160, 253, 382, 3664, 4683, 9285, 66290, 207735, 390481, 3748380, 7884391, 9136095, 11187665, 12690170, 15008945, 32067066, 34152082, 43470982, 311506482, 315458182, 317195680, 317583584, 789530607, 803190747, 818360167

Offset: 1

Author

Farideh Firoozbakht, Sep 17 2005

Keywords

• base
• fini
• nonn

Comments

This sequence is finite and the largest term is less than 10^73.

Examples

			43470982 is in the sequence because pi(43470982) = 4^1 + 3^2 + 4^3 + 7^4 + 0^5 + 9^6 + 8^7 + 2^8 = 2631327.
		

Crossrefs

Cf. A000720, A032799, A112718, A112720.

Programs

Mathematica

Do[d=IntegerDigits[n];k=Length[d];If[PrimePi[n]==Sum[d[[j]]^j, {j, k}], Print[n]], {n, 0, 170000000}]

Extensions

a(21)-a(27) from Donovan Johnson, Nov 09 2010