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A217337 Numbers n that are the signed sum of powers of 2 whose exponents concatenated form n itself. 0

%I #5 Oct 02 2012 18:28:53

%S 14,492,1052,1056,2116,16314,261818,262184,1047920,1048207

%N Numbers n that are the signed sum of powers of 2 whose exponents concatenated form n itself.

%e 14 = -2^1 + 2^4, 492 = -2^4 + 2^9 - 2^2, 1052 = 2^10 + 2^5 - 2^2, 1056 = 2^10 - 2^5 + 2^6, 2116 = 2^2 + 2^11 + 2^6, etc.

%e 1048207 is in the sequence since 1048207 = -2^1 + 2^0 + 2^4 - 2^8 + 2^20 - 2^7 and the exponents are 1, 0, 4, 8, 20, 7.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Oct 01 2012

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Last modified May 22 04:05 EDT 2024. Contains 372742 sequences. (Running on oeis4.)