64920

Appears in sequences

• Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,27.at n=23A064250
• Averages of twin prime pairs that are sums of 4 consecutive averages of twin prime pairs.at n=32A160918
• Number of arrays of length 4 that are sums of n consecutive elements of length 4+n-1 permutations of 0..4+n-2.at n=7A229567
• Number of n X 5 nonnegative integer arrays with upper left 0 and lower right n+5-4 and value increasing by 0 or 1 with every step right or down.at n=6A252873
• Number of nX7 nonnegative integer arrays with upper left 0 and lower right n+7-4 and value increasing by 0 or 1 with every step right or down.at n=4A252875
• T(n,k) = Number of n X k nonnegative integer arrays with upper left 0 and lower right n+k-4 and value increasing by 0 or 1 with every step right or down.at n=59A252876
• T(n,k) = Number of n X k nonnegative integer arrays with upper left 0 and lower right n+k-4 and value increasing by 0 or 1 with every step right or down.at n=61A252876
• Number of length-4 0..n arrays with no repeated value greater than or equal to the previous repeated value.at n=14A269410
• a(n) = 108*n^2 - 104*n + 20 (n>=1).at n=24A304835
• a(n) = A122242(4+n) XOR 16*A122242(n).at n=1A376412
• G.f.: Sum_{k>=0} x^(k*(k+1)) * Product_{j=1..k} 1/(1 - x^j)^3.at n=31A376708