Numbers k with the property that it is possible to write the base 2 expansion of k as concat(a_2,b_2), with a_2>0 and b_2>0 such that, converting a_2 and b_2 to base 10 as a and b, we have (a+b)^2 = k.
A258844
Numbers k with the property that it is possible to write the base 2 expansion of k as concat(a_2,b_2), with a_2>0 and b_2>0 such that, converting a_2 and b_2 to base 10 as a and b, we have (a+b)^2 = k.
Terms
- a(0) =9a(1) =36a(2) =49a(3) =100a(4) =225a(5) =784a(6) =961a(7) =1296a(8) =2601a(9) =3969a(10) =7225a(11) =8281a(12) =14400a(13) =16129a(14) =18496a(15) =21609a(16) =29241a(17) =34969a(18) =42025a(19) =65025a(20) =116964a(21) =123201a(22) =133225a(23) =246016a(24) =261121a(25) =278784a(26) =465124a(27) =508369a(28) =672400a(29) =700569
External references
- oeis: A258844