A233312 Terms of A114994 which are c-equivalent to "c-squares" (A020330).

0, 3, 10, 15, 36, 43, 43, 63, 136, 147, 170, 175, 147, 175, 175, 255, 528, 547, 586, 591, 586, 683, 683, 703, 547, 591, 683, 703, 591, 703, 703, 1023, 2080, 2115, 2186, 2191, 2340, 2347, 2347, 2367, 2186, 2347, 2730, 2735, 2347, 2735, 2735, 2815, 2115, 2191

Offset

0,2

Comments

About c-equivalent see in comment in A233249.

a(n) is even iff A171791(n+1) is odd - holds for at least the first 1028 terms. The reason, put very briefly, is that: a(n) is even if and only if n is the double of a "fibbinary number". Cf. A267508. [Jörgen Backelin, Jan 15 2016 added by Jeremy Gardiner, Jan 26 2016]

Links

Peter J. C. Moses, Table of n, a(n) for n = 0..2499

Index entries for sequences related to binary expansion of n

Example

c-square of 5 in binary is (10)(1)(10)(1)~(10)(10)(1)(1) which is 43 in decimal. So a(5)=43.

Crossrefs

Cf. A020330, A114994, A171791, A233249, A267508, A268032.

Sequence in context: A129307 A186575 A356318 * A330940 A351010 A020330

Adjacent sequences: A233309 A233310 A233311 * A233313 A233314 A233315

Keyword

nonn,base

Author

Vladimir Shevelev, Dec 07 2013

Extensions

More terms from Peter J. C. Moses, Dec 07 2013

Status

approved