38665

Appears in sequences

• a(0) = 1, a(n) = 23*n^2 + 2 for n>0.at n=41A010013
• a(n) = (n+1)*(2*n+1)*(3*n+1).at n=18A011199
• Triangle read by rows: T(n,k) = number of peakless Motzkin paths of length n having k (1,1) steps starting at level zero (can be easily expressed also in RNA secondary structure terminology).at n=52A089736
• Numbers with exactly one arithmetic progression of four successive divisors (not necessarily consecutive).at n=25A094530
• Column 3 of array in A133713.at n=9A133718
• Column 4 of triangle in A133721.at n=40A133723
• Column 5 of triangle in A133721.at n=51A133724
• Triangle T(n,k) represents the coefficients of (x^19*d/dx)^n, where n=1,2,3,...at n=6A223521
• 60-gonal (hexacontagonal) numbers: a(n) = n(29n - 28).at n=37A249911
• Odd composite integers m such that A085447(m) == 6 (mod m).at n=39A338078
• a(n) = 2*n^4/3 - 4*n^3/3 + 11*n^2/6 - 13*n/6 + 1.at n=16A345897
• a(n) is the numerator of the squared circumradius of a cyclic quadrilateral with sides n, n+1, n+2, n+3.at n=5A351696
• a(n) = (6*n + 1)*(12*n + 1)*(18*n + 1).at n=3A382809
• Array read by ascending antidiagonals: A(n,k) = (6*n + 1)*(12*n + 1)*Product_{i=0..k-2} (9*2^i*n + 1) with k >= 2.at n=11A382835