19098

Appears in sequences

• Coordination sequence for root lattice B_3.at n=31A022145
• a(n) = position of n^3 + (n+1)^3 + (n+2)^3 in A003072.at n=37A024972
• a(n) = 26 + 2^(n+1)*(-13 +9*n -3*n^2 +n^3).at n=6A036827
• a(n) = smallest non-palindromic k such that the Reverse and Add! trajectory of k is palindrome-free and joins the trajectory of A070788(n).at n=8A089494
• a(n) = smallest non-palindromic number k such that the Reverse and Add! trajectory of k joins the trajectory of A089521(n).at n=0A089522
• sigma(n) + n is a square.at n=38A114069
• Number of distinct printable hexaflexagons of length n.at n=22A286111
• a(1) = 0, a(2) = 1, and for n > 2, a(n) = 2*a(A252463(n)) + [n == 1 (mod 6)].at n=46A292941
• a(n) = 2*a(n-1) - a(n-3) + a(floor(n/2)), where a(0) = 1, a(1) = 1, a(2) = 1.at n=19A298402
• Numbers k such that the Reverse and Add! trajectory of k (presumably) does not reach a palindrome and does not join the trajectory or one of the reverse numbers of the trajectory of any term m < k.at n=41A306232
• Third Lie-Betti number of a path graph on n vertices.at n=45A361230
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = Sum_{j=0..n} 2^j * j^k.at n=51A368479