23480

Appears in sequences

• Square array read by antidiagonals of number of length k walks on an n-dimensional hypercubic lattice starting at the origin and staying in the nonnegative part.at n=59A064044
• Triangle T(n,k) read by rows, given by [0, 1, 0, 1, 0, 1, 0, 1, 0, 1, ...] DELTA [1, 0, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, ...] where DELTA is the operator defined in A084938.at n=50A086329
• Triangle read by rows of the numbers T(n,k) (n > 1, 0 < k < n) of set partitions of n of length k which do not have a proper subset of parts with a union equal to a subset {1,2,...,j} with j < n.at n=40A087903
• A transform of the Pell numbers.at n=11A099626
• Indices of primes in sequence defined by A(0) = 27, A(n) = 10*A(n-1) - 23 for n > 0.at n=11A101959
• Number of 6X6 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.at n=35A156389
• Smallest integer starting a group of exactly n consecutive untouchable numbers (A005114) with term differences of 2.at n=5A231965
• Square roots of highly composite numbers, floored down: a(n) = A000196(A002182(n)).at n=63A263096
• a(n) = 15*n^2 - 13*n.at n=40A263226
• The growth series for the affine Weyl group F_4.at n=36A266784
• Numbers k such that Bernoulli number B_{k} has denominator 13530.at n=15A295587
• Number of integer compositions of n with all distinct run-sums.at n=20A353850
• Table read by rows: T(n,k) = the number of regions with k sides, k >= 3, in a Farey diagram of order (n,n).at n=14A358885