33320

Appears in sequences

• Heptagonal (or 7-gonal) pyramidal numbers: a(n) = n*(n+1)*(5*n-2)/6.at n=34A002413
• Expansion of 1 / (Sum_{n=-oo..oo} x^(n^2))^4.at n=8A004405
• exp(tan(x)*arcsin(x))=1+2/2!*x^2+24/4!*x^4+670/6!*x^6+33320/8!*x^8...at n=4A012375
• Sum(C(j)*(n-j)*4^(n-j),j=0..n-1), C = Catalan numbers.at n=6A018217
• a(n) = (n+1)*binomial(n+4, 4).at n=13A027800
• Distinct even elements in 3-Pascal triangle A028262 (by row).at n=42A028269
• Even elements to right of central elements in 3-Pascal triangle A028262.at n=35A028273
• Product of n with sum of next n consecutive integers.at n=27A036659
• Numbers whose base-8 representation has exactly 6 runs.at n=28A043628
• Numbers whose base-4 representation contains exactly four 0's and four 2's.at n=6A045061
• a(n) = n*(n-1)*(n-2)*(3*n-2)/6.at n=17A096200
• Structured great rhombicubeoctahedral numbers.at n=13A100146
• Triangle T(n,k), 0<=k<=n, defined by T(n,k) = 0 if k<0 or k>n, T(0,0) = 1, T(n,k) = T(n,k-1)+T(n-1,k-1)+T(n-1,k)+T(n-1,k+1).at n=30A122479
• Row sums of unsigned A128090.at n=13A128091
• Maximal apex value of an addition triangle whose base is a permutation of {k-n/2, k=0..n}.at n=13A206603
• Even heptagonal pyramidal numbers.at n=24A218325
• Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 3.at n=27A255793
• a(n) = n*(n + 1)*(n + 2)*(9*n - 7)/12.at n=14A264852
• Expansion of eta(q^2)^4 / eta(q)^8 in powers of q.at n=8A284286
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.at n=32A286785