53145

Appears in sequences

• Log of g.f. for rooted trees.at n=10A006900
• Number of 4-voter voting schemes with n linearly ranked choices.at n=8A007010
• n written in fractional base 7/5.at n=40A024642
• Triangle read by rows: semigroups of order n with k idempotents, considered to be equivalent when they are isomorphic or anti-isomorphic (by reversal of the operator).at n=24A058123
• a(n) = n^5 - n^4 + n^3 - n^2 + n.at n=9A191012
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 633", based on the 5-celled von Neumann neighborhood.at n=7A273300
• a(n) = Sum_{k=1..n} k^2*phi(k), where phi is the Euler totient function A000010.at n=23A319087