168441498225
domain: N
Appears in sequences
- a(n) is the least common multiple of {1, 5, 9, 13, 17, ..., 4n+1} (A016813).at n=10A051539
- a(n) is the least common multiple of {1, 5, 9, 13, 17, ..., 4n+1} (A016813).at n=11A051539
- a(n) = (4*n+9)(!^4)/9(!^4), related to A007696(n+1) ((4*n+1)(!^4) quartic, or 4-factorials).at n=8A051621
- Denominator of 1 + 1/5 + 1/9 +...+ 1/(4n+1).at n=10A097328
- Minimal number of times a rectangular grid of n X n+1 elements can be slid along a 45-degree line before a rotated version of the initial grid appears.at n=21A110026
- Minimal number of times a rectangular grid of n X n+1 elements can be slid along a 45-degree line before a rotated version of the initial grid appears.at n=23A110026