491136

Appears in sequences

• Numbers k such that k | phi(k)*d(k) - sigma(k), where phi=A000010, d=A000005 and sigma=A000203.at n=11A055650
• Sum of all proper base 4 numbers with n digits (those not beginning with 0).at n=4A121544
• a(n) = 6*a(n-1) - 8*a(n-2), for n > 2, with a(0) = 1, a(1) = 6, a(2) = 27.at n=9A171475