250800

Appears in sequences

• a(1)=1. a(n) = the smallest positive integer that, when written in binary, contains both binary a(n-1) and binary n as (possibly overlapping) substrings.at n=15A164859
• E.g.f.: [Sum_{n>=0} x^n * exp(n^2*x)] * [Sum_{n>=0} x^n / exp(n^2*x)].at n=6A320830
• Number of compositions of n with no part divisible by the next.at n=34A328460
• Number of 3-sided prudent polygons of area n.at n=14A348838