64691

Appears in sequences

• Numbers n such that n = pi(n)*k + 1 for some k.at n=38A065136
• Numbers n such that there exists at least one number j and pi(m) = d_1 d_2 ... d_j*d_(j+1) d_(j+2) ... d_k where d_1 d_2 ...d_k is the decimal expansion of n.at n=34A112012
• Start with 1 and repeatedly reverse the digits and add 65 to get the next term.at n=35A118163
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 1), (0, 0, -1), (1, 0, 1), (1, 1, 1)}.at n=8A150948
• a(n) = Sum_{i=0..n} digsum_7(i)^4, where digsum_7(i) = A053828(i).at n=38A231679
• Numbers k where k^2 is an anagram of (k+2)^2.at n=22A261749
• -a(n)/7! is the coefficient of x^7 in the Taylor expansion of the k-th iteration of sin(x).at n=11A366827