129675

Appears in sequences

• Number of diagonal dissections of an n-gon into 4 regions.at n=13A033276
• Numbers n such that phi(n)=phi(n+5), with Euler's totient function phi=A000010.at n=11A179187
• Triangle read by rows: the Y-transformation of the Catalan triangle A033184.at n=51A228335
• Let G denote the 7-node, 12-edge graph formed from a hexagon with main diagonals drawn and a node at the center; a(n) = number of magic labelings of G with magic sum 2n.at n=12A244866
• Number of length-n 0..2 arrays with no repeated value differing from the previous repeated value by plus or minus one modulo 2+1.at n=11A269684
• a(n) is the smallest number k with exactly n of its divisors in A052294.at n=23A363463