27034

Appears in sequences

• Harary-Read numbers: restricted hexagonal polyominoes (cata-polyhexes) with n cells.at n=11A002216
• Number of planar n X n X n binary triangular grids with no more than 4 ones in any 5 X 5 X 5 subtriangle.at n=6A153538
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 283", based on the 5-celled von Neumann neighborhood.at n=34A271119
• Numbers n such that sigma(n) is a Fibonacci number.at n=20A272412
• Numbers k such that tau(k) and sigma(k) are both Fibonacci numbers.at n=7A390231