22618

Appears in sequences

• a(n) = A259095(2n,n).at n=23A005575
• Triangle read by rows: CP(n,i) for n>=0 and 3n+1 >= i >= 0, gives the absolute value of the coefficients of the chromatic polynomial of C_3 X P_(n+1) factored in the form x(x-1)^i.at n=46A123531
• Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 44.at n=3A156508
• 27-gonal numbers: a(n) = n*(25*n-23)/2.at n=43A255186
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 205", based on the 5-celled von Neumann neighborhood.at n=31A270731
• Sum of first n Honaker primes.at n=15A276255
• G.f. A(x) satisfies A(x) = 1 / (1 - x*(1 + x*A(x))^5).at n=7A364744