61132

Appears in sequences

• Numbers k such that sigma(k) = phi(k+1) + phi(k) + phi(k-1).at n=21A065986
• Numbers k such that sigma(k) = 2*phi(k+1).at n=24A068423
• Numbers k for which phi(k) = phi(k+1) - phi(k-1).at n=26A076529
• Number of partitions into strokes of the star graph with n edges on the plane, up to rotations and reflections around the center node.at n=11A089243
• Numbers n such that phi(n)*sigma(n)=phi(n-1)*sigma(n-1) (phi is the Euler totient function A000010 and sigma is the sum-of-divisors function A000203).at n=13A140790
• Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 7 or 8 king-move adjacent elements, with upper left element zero.at n=12A305582
• Consecutive states of the linear congruential pseudo-random number generator (1861*s + 49297) mod 233280 when started at s=1.at n=3A385360