302526

Appears in sequences

• Triangle of coefficients in expansion of (3+7x)^n.at n=26A013624
• Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*3^j.at n=22A038269
• a(n) = binomial(n+5, 5)*7^n.at n=4A140404
• Irregular triangle read by rows of normalized Girard-Waring formula (cf. A210258), for m=7 data values.at n=32A288245
• Triangle read by rows: T(0,0) = 1; T(n,k) = T(n-1,k) + 7 * T(n-2,k-1) for k = 0..floor(n/2). T(n,k)=0 for n or k < 0.at n=53A317016
• Number of n-step self-avoiding walks on the Laves graph with no non-contiguous adjacencies.at n=18A344040
• Number of free treelike midpoint-free polycubes of size n, identifying rotations and reflections.at n=21A368031
• Irregular triangle T(n, k) = Product_{i=1..n} prime(i)^(k mod prime(i)), with n >= 0, and 0 <= k < A002110(n), read by rows.at n=44A391933
• a(n) is the conjectured largest number such that both a(n) and a(n) - n are 11-smooth numbers, or 0 if no such number exists. a(n) can be less than n.at n=25A392256