22774

Appears in sequences

• a(n)=a(n-1)+a(n-2)-d, where d=a(n/3) if 3 divides n, else d=0; 2 initial terms.at n=23A050193
• Number of distinct resistances possible for n resistors with resistances 1, 2, ..., n, each connected in series or parallel to the previous one.at n=6A051045
• Expansion of (1-2x)/(1-3x-x^3+2x^4).at n=10A052976
• Determinant of n X n matrix of first n^2 squarefree numbers.at n=8A119514
• Numbers n such that phi(sigma*(n)) = sigma*(phi(n)), where sigma*(n) is the sum of anti-divisors of n and phi(n) is the Euler totient function.at n=9A243996
• Number of 11-regular partitions of n (no part is a multiple of 11).at n=38A328545