10 Mar
2020
10 Mar
'20
5:37 p.m.
Hello Math-Fun, The digits of a(n) and a(n+1), interleaved in a proper manner, produce a prime. This is the lexicographically earliest infinite sequence of distinct positive terms with this property (I hope): S = 1,3,2,9,5,11,8,21,4,7,6,13,10,19,12,23,18,... We accept two ways of interleaving the digits of A and B (with A ad B sharing the same number of digits – or differing by one). (...) 15 more ligns (and color marks) here on my weblog: https://bit.ly/3aE4wgi Best, É.