26611

Appears in sequences

• From George Gilbert's marks problem: jumping 5 marks at a time (initial positions).at n=13A019993
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 19 ones.at n=22A031787
• Sum of terms in row n of A081532.at n=32A081533
• Number of all extensions over Q_2 with degree n in the algebraic closure of Q_2.at n=17A100976
• Numbers k such that (2*k)!/(2*(k!)^2)+1 is prime.at n=48A112863
• Sum of divisors of the minimal numbers (A007416).at n=37A256259
• a(n) = f(1,n,n), where f is the Sudan function defined in A260002.at n=11A260006
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 197", based on the 5-celled von Neumann neighborhood.at n=33A270718
• Number of inequivalent ways of placing 2 nonattacking rooks on n X n board up to rotations and reflections of the board.at n=25A307304
• Numbers that are both binary palindromes and binary Smith numbers.at n=42A334530