2195382771

Appears in sequences

• a(n) = n*3^n.at n=17A036290
• a(n) = (2n-1) * 3^(2n-1).at n=8A060851
• Number of 4-ary Lyndon words of length n with exactly three 1s.at n=15A124811
• Egyptian fraction expansion for Pi/4 = arctan(1/2) + arctan(1/3) (Hutton 1776).at n=17A157327
• a(n) = 17*3^n.at n=17A258598
• Numbers with prime factorization of the form p_1^p_2*p_2^p_3*...p_(n-1)^p_n*p_n where p_(n-1) < p(n) and n > 1.at n=21A294110