20185

Appears in sequences

• Number of points in Z^4 of norm <= n.at n=8A055410
• Number of points in Z^n of norm <= 8.at n=4A055432
• Iccanobirt numbers (1 of 15): a(n) = a(n-1) + a(n-2) + R(a(n-3)), where R is the digit reversal function A004086.at n=18A102111
• a(n) = 841*n + 1.at n=23A158404
• a(n) = 24*n^2 + 1.at n=29A158547
• Number of third differences of arrays of length 5 of numbers in 0..n.at n=23A228261
• Number of (n+1) X (2+1) 0..1 arrays x(i,j) with row sums Sum_{j=1..2+1} x(i,j) nondecreasing, and column sums Sum_{i=1..n+1} i^2*x(i,j) nondecreasing.at n=6A233298
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..k+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing.at n=34A233301
• Irregular triangle read by rows: T(n, k) is the number of chains of subspaces 0 < V_1 < ... < V_r = (F_2)^n, counted up to coordinate permutation, with dimension increments given by (any fixed permutation of) the parts of the k-th partition of n in Abramowitz-Stegun order.at n=58A348113
• a(n) = Sum_{k=0..floor(n/4)} 2^k * binomial(2*n-6*k,2*k).at n=15A387623