42640

Appears in sequences

• Number of bracelets (turnover necklaces) of n beads of 2 colors, 7 of them black.at n=24A032280
• Number of labeled totally ordered semigroups with n elements.at n=6A084965
• a(n) = (7*n+2)*(7*n+5) = 49*n^2 + 49*n + 10.at n=29A177060
• Number of -n..n arrays of 4 elements with zero sum and no two neighbors summing to zero.at n=19A199833
• a(n) = 2*n*(n+1)*(n+2)/3.at n=39A210440
• Padovan like sequence: a(n) = a(n-2) + a(n-3) for n>3, a(1)=2, a(2)=2, a(3)=0.at n=38A276275
• Period of the Fibonacci n-step sequence mod n.at n=11A351657
• Partial sums of the odd triangular numbers (A014493).at n=39A352116