33456

Appears in sequences

• Sixth column (r=5) of FS(3) staircase array A062745.at n=16A062749
• Coefficient of x^5 in (1-x-x^2)^(-n).at n=15A139798
• a(n) = Sum_{d|n} phi(n/d)^2*2^(d+1).at n=14A161217
• Append three digits, each increasing by one modulo 10 from the last digit of the nonnegative integers. 0 -> 123, 1 -> 1234 2 -> 2345, ... , 9 -> 9012, 10 -> 10123, etc.at n=33A167231
• Antidiagonal sums of the convolution array A213833.at n=15A213834
• G.f. A(x) satisfies: A(x) = x + 2*A(x^2) + 4*A(x^3) + 8*A(x^4) + ... + 2^(k-1)*A(x^k) + ...at n=15A308076
• Numbers n for which A324108(n) = A324054(n-1) and which are neither prime powers nor of the form 2^i * p^j, where p is an odd prime, with either exponent i or j > 0.at n=17A324111
• a(n) = Sum_{j=0..n} (-1)^(n-j) * Product_{k=(j-1)*n+1..j*n} k.at n=4A349480
• Expansion of (1-x^2) / (1-2*x-5*x^2+2*x^3).at n=9A384671