26368

Appears in sequences

• Number of non-vanishing Feynman diagrams of order 2n for the electron or the photon propagators in quantum electrodynamics.at n=6A005411
• Binomial transform, alternating in sign, of the tribonacci numbers.at n=25A073358
• Difference between n-th prime squared and n-th perfect square.at n=38A106588
• Centered 47-gonal numbers.at n=33A129428
• a(n) = 2a(n-2) + 4a(n-3), n >= 3.at n=19A134812
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (0, 0, -1), (0, 1, 0), (1, 0, 0)}.at n=10A149819
• a(n) = (n+1)*(6*n^4 - 51*n^3 + 161*n^2 - 251*n + 251).at n=7A165281
• Expansion of 1/(1-2*x^2-4*x^3). (2,4)-Padovan sequence.at n=16A176739
• Products of the 8th power of a prime and a distinct prime (p^8*q).at n=26A179668
• Number of 5-element nondividing subsets of {1, 2, ..., n}.at n=27A187492
• Values of n such that there are exactly 7 solutions to x^2 - y^2 = n with x > y >= 0.at n=38A257414
• A(n,k) is the sum over all Dyck paths of semilength n of products over all peaks p of (x_p+k*y_p)/y_p, where x_p and y_p are the coordinates of peak p; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=27A258219
• T(n,k) = 1/k! * Sum_{i=0..k} (-1)^(k-i) *C(k,i) * A258219(n,i); triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=21A258220
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 313", based on the 5-celled von Neumann neighborhood.at n=14A281042
• Expansion of Product_{k>=1} 1/((1 - x^(2*k-1))^(k*(5*k-3)/2)*(1 - x^(2*k))^(k*(5*k+3)/2)).at n=12A294654
• Square array A(n,k), n >= 0, k >= 1, read by antidiagonals: A(n,k) = exp(1/k) * Sum_{j>=0} (k*j + 1)^n / ((-k)^j * j!).at n=62A334192
• Heptagonal numbers (A000566) with prime indices (A000040).at n=26A346494
• a(n) is the unique number m such that A126168(m) = A361419(n).at n=50A361420
• Number of integer partitions of 2n whose distinct parts sum to n.at n=30A364910