A097641 Numbers n such that n=d_1^pi(d_1)+d_2^pi(d_2)+...+d_k^pi(d_k) where d_1 d_2 ... d_k is the decimal expansion of n.

1, 2, 135, 2537

Offset

1,2

Links

Table of n, a(n) for n=1..4.

Example

2537 is in the sequence because 2537 = 2^pi(2)+5^pi(5)+3^pi(3)+7^pi(7).

Crossrefs

Cf. A000720, A097640.

Sequence in context: A221468 A327911 A318965 * A065963 A353012 A226118

Adjacent sequences: A097638 A097639 A097640 * A097642 A097643 A097644

Keyword

base,fini,full,nonn

Author

Farideh Firoozbakht, Aug 22 2004

Status

approved