48467

Appears in sequences

• Expansion of Product_{m>=1} (1 + m*q^m)^17.at n=5A022645
• a(n) = 1^2 + prime(1)^2 + prime(2)^2 + ... + prime(n)^2.at n=23A024525
• a(n) = binomial(n, floor(n/2)) - n*(n - 1)/2.at n=17A129937
• Number of (n+3) X 10 0..1 matrices with each 4 X 4 subblock idempotent.at n=17A224567
• Numbers k such that 9*R_(k+2) - 5*10^k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=5A257038