1610612739domain: NAppears in sequencesNew record highs reached in A060000.at n=32A060013a(n) = n*x^n + (n-1)*x^(n-1) + . . . + x + 1 for x=2.at n=25A088578a(n) is the number whose binary representation is A138144(n).at n=30A147595First differences of A158916.at n=30A158926