A139410 Numbers n such that n = 4^d_1 + 4^d_2 + ... + 4^d_k where d_1d_2...d_k is the decimal expansion of n.

4624, 595968

Offset: 1

Author

Farideh Firoozbakht, May 11 2008

Keywords

• base
• fini
• full
• nonn
• bref

Examples

			595968 = 4^5 + 4^9 + 4^5 + 4^9 + 4^6 + 4^8.
		

Programs

Mathematica

Select[Range[596000],Total[4^IntegerDigits[#]]==#&] (* Harvey P. Dale, May 21 2021 *)