24575

Appears in sequences

• A nonlinear recurrence.at n=42A003073
• Numbers having four 7's in base 8.at n=5A043452
• a(0) = 1; a(n) = 3*2^n - 1, for n > 0.at n=13A052940
• a(2n) = 2*2^n - 1, a(2n+1) = 3*2^n - 1.at n=27A052955
• a(0) = 0; for n > 0, a(n) = 3*2^(n-1) - 1.at n=14A055010
• Duplicate of A055010.at n=14A060153
• a(n) = n*4^n - 1, with a(0) = 1.at n=6A060416
• Nonprime solutions to k == -1 (mod phi(k+1)).at n=41A067930
• Variation on Ulam numbers: a(1) = 1; a(2) = 2; for n>2, a(n) = smallest (n odd) or largest (n even) number > a(n-1) that is a unique sum of two distinct earlier terms.at n=27A081026
• a(0) = 1; for n > 0, a(n) = 3*2^(n-1) - 1.at n=14A083329
• Add 1, double, add 1, double, etc.at n=27A083416
• Duplicate of A055010.at n=14A086219
• a(n) = (n+1) * 2^n - 1.at n=11A087323
• a(n) = 3*2^floor((n-1)/2) + (-1)^n.at n=26A097581
• Slater-Velez permutation sequence of the 2nd kind.at n=26A129198
• a(n) = 6*4^n - 1.at n=6A140529
• a(n) = 3*(-1)^(n+1)*2^n - 1.at n=13A140683
• Number of proper divisors of the Catalan number A000108(n).at n=39A153788
• Number of proper divisors of the Catalan number A000108(n).at n=38A153788
• a(n) = 3*2^n - 1.at n=13A153893