30636

Appears in sequences

• T(n,n+3), array T as in A047150.at n=8A047158
• McKay-Thompson series of class 24I for Monster.at n=31A058579
• Heptagonal numbers for which the sum of the digits is also a heptagonal number.at n=27A117650
• McKay-Thompson series of class 24I for the Monster group with a(0) = 2.at n=31A138688
• a(n) = 1458*n + 18.at n=20A157505
• Expansion of (1+13*x+32*x^2+13*x^3+x^4)/(1-x)^5.at n=10A160765
• Riordan array (1, (A000045(x)/x-1) *A001006(A000045(x)/x-1) ).at n=38A187537
• Least b > p_n^2 such that [p_1^2,p_2^2,...,p_n^2] in base b is prime, where p_j denotes the j-th prime.at n=38A224197
• a(n) = n*(n + 1)*(5*n - 4)/2.at n=23A237616
• Number of length 2+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.at n=22A248539
• a(n) = n*(n + 7)*(n + 14)*(n + 21)*(n + 28)/120.at n=9A264449
• Numbers k such that sigma(phi(k)) - phi(k) = phi(sigma(k)), where phi(k) is the Euler totient function of k and sigma(k) is the sum of the divisors of k.at n=11A271633
• Number of n-step self-avoiding walks on a 2D square lattice whose end-to-end distance is an integer.at n=11A359709