A139178 Numbers n such that n=(pi(d_1)+pi(d_1!)+pi(d_1!!))+...+ (pi(d_k)+pi(d_k!)+pi(d_k!!)) where d_1 d_2 ... d_k is the decimal expansion of n.

54, 713, 724, 4348

Offset

1,1

Links

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

Example

4348=(pi(4)+pi(4!)+pi(4!!))+(pi(3)+pi(3!)+pi(3!!))+(pi(4)+ pi(4!)+pi(4!!))+(pi(8)+pi(8!)+pi(8!!)) so 4348 is in the sequence.

Crossrefs

Sequence in context: A321635 A090835 A069980 * A288838 A157094 A232829

Adjacent sequences: A139175 A139176 A139177 * A139179 A139180 A139181

Keyword

base,fini,full,nonn

Author

Farideh Firoozbakht, Apr 12 2008

Status

approved